According to the Wat Kud Tae inscription (K.1105), dated c. 7th century, during the period that the eastern Mon entity, Lavo, was strongly influenced by the Chenla, the Siamese Mon in the west also established a royal intermarriage with Chenla as Sri Chakatham, prince of Sambhuka (ศามภูกะ, in the present-day Ratchaburi province), married to a princess of Isanavarman I, and two mandalas then became an ally. After Chenla sieged Funan and moved the center to Angkor, both Siamese Mon and the Angkorian eventually marched the troops to attack Vijaya of Champa in 1201 during the reign of Jayavarman VII, as recorded in the Cho-Dinh inscription (C.3).
Around 1240, Pho Khun Bang Klang Hao, a local Tai ruler, rallied the people to rebel against the Khmer. He later crowned himself the first king of Sukhothai Kingdom in 1238. Mainstream Thai historians count Sukhothai as the first kingdom of Thai people. Sukhothai expanded furthest during the reign of Ram Khamhaeng (r. 1279–1298). However, it was mostly a network of local lords who swore fealty to Sukhothai, not directly controlled by it. He is believed have invented Thai script and Thai ceramics were an important export in his era. Sukhothai embraced Theravada Buddhism in the reign of Maha Thammaracha I (1347–1368).
In the late 10 century, Tai people began to migrate further south to the present-day upper central Thailand. Around the 1100s period, several cities in this area, such as Songkwae, Sawankhalok, and Chakangrao, were ruled by the Tai people, and they eventually launched several battles against the pre-existing Mon of Lavo, who had been falling under Chenla and Khmer influences since the 7th century, thus bringing the establishment of the Tai people's independent state, Sukhothai Kingdom, in the upper Chao Phraya River valley in 1238.
In addition to Singhanavati, another northern principality probably related to the Tai people, Ngoenyang, was established as the successor of Singhanavati in 638 by Lavachakkaraj [th], also centered in Wieng–Prueksha [th] (present-day Mae Sai District, Chiang Rai). Its seat was moved to Chiang Mai in 1262 by King Mangrai, which considered the foundation of the Lan Na kingdom. Mangrai unified the surrounding area and also created a network of states through political alliances to the east and north of the Mekong. His dynasty would rule the kingdom continuously for the next two centuries. Lan Na expanded its territory southward and annexed the Mon Hariphunchai of Dvaravati in 1292.
During the Sukhothai Kingdom, most literary works were written in simple prose with certain alliteration schemes. Major works include King Ram Khamhaeng Inscription describing life at the time, which is considered the first literary work in Thai script, but some historians questioned its authenticity. Trai Phum Phra Ruang, written in 1345 by King Maha Thammaracha I, expounds Buddhist philosophy based on a profound and extensive study with reference to over 30 sacred texts and could be considered the nation's first piece of research dissertation.
European contact and trade started in the early-16th century, with the envoy of Portuguese duke Afonso de Albuquerque in 1511. Portugal became an ally and ceded some soldiers to King Rama Thibodi II. The Portuguese were followed in the 17th century by the French, Dutch, and English. Rivalry for supremacy over Chiang Mai and the Mon people pitted Ayutthaya against the Burmese Kingdom. Several wars with its ruling Taungoo dynasty starting in the 1540s in the reign of Tabinshwehti and Bayinnaung were ultimately ended with the capture of the capital in 1570. Then was a brief period of vassalage to Burma until Naresuan proclaimed independence in 1584.
Tai peoples migrated from southwestern China to mainland Southeast Asia from the 6th to 11th centuries. Indianised kingdoms such as the Mon, Khmer Empire, and Malay states ruled the region, competing with Thai states such as the Kingdoms of Ngoenyang, Sukhothai, Lan Na, and Ayutthaya, which also rivalled each other. European contact began in 1511 with a Portuguese diplomatic mission to Ayutthaya, which became a regional power by the end of the 15th century. Ayutthaya reached its peak during the 18th century, until it was destroyed in the Burmese–Siamese War. King Taksin the Great quickly reunified the fragmented territory and established the short-lived Thonburi Kingdom (1767–1782), of which he was the only king. He was succeeded in 1782 by Buddha Yodfa Chulaloke (Rama I), the first monarch of the current Chakri dynasty. Throughout the era of Western imperialism in Asia, Siam remained the only state in the region to avoid colonization by foreign powers, although it was often forced to make territorial, trade, and legal concessions in unequal treaties. The Siamese system of government was centralised and transformed into a modern unitary absolute monarchy during the reign of Chulalongkorn (Rama V). In World War I, Siam sided with the Allies, a political decision made in order to amend the unequal treaties. Following a bloodless revolution in 1932, it became a constitutional monarchy and changed its official name to Thailand, becoming an ally of Japan in World War II. In the late 1950s, a military coup under Field Marshal Sarit Thanarat revived the monarchy's historically influential role in politics. During the Cold War, Thailand became a major ally of the United States and played an anti-communist role in the region as a member of the failed SEATO, but since 1975 it has sought to improve relations with Communist China and Thailand's neighbours.
After a bloody period of dynastic struggle, Ayutthaya entered into what has been called the Siamese "golden age", a relatively peaceful episode in the second quarter of the 18th century when art, literature, and learning flourished. There were seldom foreign wars, apart from conflict with the Nguyễn lords for control of Cambodia starting around 1715. The last fifty years of the kingdom witnessed bloody succession crises, where there were purges of court officials and able generals for many consecutive reigns. In 1765, a combined 40,000-strong force of Burmese armies invaded it from the north and west. The Burmese under the new Alaungpaya dynasty quickly rose to become a new local power by 1759. After a 14-month siege, the capital city's walls fell and the city was burned in April 1767.
Chao Tak then crowned himself as Taksin and proclaimed Thonburi as temporary capital in the same year. He also quickly subdued the other warlords. His forces engaged in wars with Burma, Laos, and Cambodia, which successfully drove the Burmese out of Lan Na in 1775, captured Vientiane in 1778 and tried to install a pro-Thai king in Cambodia in the 1770s. In his final years there was a coup, caused supposedly by his "insanity", and eventually Taksin and his sons were executed by his longtime companion General Chao Phraya Chakri (the future Rama I). He was the first king of the ruling Chakri dynasty and founder of the Rattanakosin Kingdom on 6 April 1782.
Under Rama I (1782–1809), Rattanakosin successfully defended against Burmese attacks and put an end to Burmese incursions. He also created suzerainty over large portions of Laos and Cambodia. In 1821, Briton John Crawfurd was sent to negotiate a new trade agreement with Siam – the first sign of an issue which was to dominate 19th century Siamese politics. Bangkok signed the Burney Treaty in 1826, after the British victory in the First Anglo-Burmese War. Anouvong of Vientiane, who mistakenly held the belief that Britain was about to launch an invasion of Bangkok, started the Lao rebellion in 1826 which was suppressed. Vientiane was destroyed and a large number of Lao people were relocated to Khorat Plateau as a result. Bangkok also waged several wars with Vietnam, where Siam successfully regained hegemony over Cambodia.
The population of elephants, the country's national symbol, has fallen from 100,000 in 1850 to an estimated 2,000. Poachers have long hunted elephants for ivory and hides, and now increasingly for meat. Young elephants are often captured for use in tourist attractions or as work animals, where there have been claims of mistreatment. However, their use has declined since the government banned logging in 1989.
Chulalongkorn (r. 1868–1910) initiated centralisation, set up a privy council, and abolished slavery and the corvée system. The Front Palace crisis of 1874 stalled attempts at further reforms. In the 1870s and 1880s, he incorporated the protectorates up north into the kingdom proper, which later expanded to the protectorates in the northeast and the south. He established twelve krom in 1888, which were equivalent to present-day ministries. The crisis of 1893 erupted, caused by French demands for Laotian territory east of Mekong. Thailand is the only Southeast Asian state never to have been colonised by a Western power, in part because Britain and France agreed in 1896 to make the Chao Phraya valley a buffer state. Not until the 20th century could Siam renegotiate every unequal treaty dating from the Bowring Treaty, including extraterritoriality. The advent of the monthon system marked the creation of the modern Thai nation-state. In 1905, there were unsuccessful rebellions in the ancient Patani area, Ubon Ratchathani, and Phrae in opposition to an attempt to blunt the power of local lords.
Thailand had a population of 69,799,978 as of 2020, Thailand's first census in 1909 found the population to be 8.2 million. Thailand's population is largely rural, concentrated in the rice-growing areas of the central, northeastern and northern regions. About 44.2% of Thailand's population lived in urban areas as of 2010 , slowly increasing from 29.4% in the 1990 census and 31.1% in the 2000 census.
The Palace Revolt of 1912 was a failed attempt by Western-educated military officers to overthrow the Siamese monarchy. Vajiravudh (r. 1910–1925) responded by propaganda for the entirety of his reign, which promoted the idea of the Thai nation. In 1917, Siam joined the First World War on the side of the Allies. In the aftermath Siam had a seat at the Paris Peace Conference, and gained freedom of taxation and the revocation of extraterritoriality.
A bloodless revolution took place in 1932, in which Prajadhipok was forced to grant the country's first constitution, thereby ending centuries of feudal and absolute monarchy. The combined results of economic hardships brought on by the Great Depression, sharply falling rice prices, and a significant reduction in public spending caused discontent among aristocrats. In 1933, a counter-revolutionary rebellion occurred which aimed to reinstate absolute monarchy, but failed. Prajadhipok's conflict with the government eventually led to abdication. The government selected Ananda Mahidol, who was studying in Switzerland, to be the new king.
Prior to 1932, Thai kings were feudal or absolute monarchs. During Sukhothai Kingdom, the king was seen as a Dharmaraja or 'king who rules in accordance with Dharma'. The system of government was a network of tributaries ruled by local lords. Modern absolute monarchy and statehood was established by Chulalongkorn when he transformed the decentralized protectorate system into a unitary state. On 24 June 1932, Khana Ratsadon (People's Party) carried out a bloodless revolution which marked the beginning of constitutional monarchy.
Later that decade, the army wing of Khana Ratsadon came to dominate Siamese politics. Plaek Phibunsongkhram who became premier in 1938, started political oppression and took an openly anti-royalist stance. His government adopted nationalism and Westernisation, anti-Chinese and anti-French policies.
In 1939, there was a decree changing the name of the country from "Siam" to "Thailand". In 1941, Thailand was in a brief conflict with Vichy France resulting in Thailand gaining some Lao and Cambodian territories.
The signature of King Mongkut (r. 1851–1868) reads SPPM (Somdet Phra Poramenthra Maha) Mongkut Rex Siamensium (Mongkut, King of the Siamese). This usage of the name in the country's first international treaty gave the name Siam official status, until 24 June 1939 when it was changed to Thailand. Thailand was briefly renamed Siam from 1946 to 1948, after which it again reverted to Thailand.
On 8 December 1941, the Empire of Japan launched an invasion of Thailand, and fighting broke out shortly before Phibun ordered an armistice. Japan was granted free passage, and on 21 December Thailand and Japan signed a military alliance with a secret protocol, wherein the Japanese government agreed to help Thailand regain lost territories. The Thai government declared war on the United States and the United Kingdom. The Free Thai Movement was launched both in Thailand and abroad to oppose the government and Japanese occupation. After the war ended in 1945, Thailand signed formal agreements to end the state of war with the Allies. The main Allied powers had ignored Thailand's declaration of war.
In June 1946, young King Ananda was found dead under mysterious circumstances. His younger brother Bhumibol Adulyadej ascended to the throne. Thailand joined the Southeast Asia Treaty Organization (SEATO) to become an active ally of the United States in 1954. Field Marshal Sarit Thanarat launched a coup in 1957, which removed Khana Ratsadon from politics. His rule (premiership 1959–1963) was autocratic; he built his legitimacy around the god-like status of the monarch and by channelling the government's loyalty to the king. His government improved the country's infrastructure and education. After the United States joined the Vietnam War in 1961, there was a secret agreement wherein the U.S. promised to protect Thailand.
The well-known Lumpinee Boxing Stadium originally sited at Rama IV Road near Lumphini Park hosted its final Muay Thai boxing matches on 8 February 2014 after the venue first opened in December 1956. From 11 February 2014, the stadium will relocate to Ram Intra Road, due to the new venue's capacity. Thammasat Stadium is a multi-purpose stadium in Bangkok, currently used mostly for football matches. It was built for the 1998 Asian Games. Rajamangala National Stadium is the biggest sporting arena in Thailand, with a capacity of 65,000. The stadium was built in 1998 for the 1998 Asian Games and is the home stadium of the Thailand national football team.
Thailand's government-sponsored family planning program resulted in a dramatic decline in population growth from 3.1% in 1960 to around 0.4% today. In 1970, an average of 5.7 people lived in a Thai household. In 2022, the average Thai household size was 3 people.
The period brought about increasing modernisation and Westernisation of Thai society. Rapid urbanisation occurred when the rural populace sought work in growing cities. Rural farmers gained class consciousness and were sympathetic to the Communist Party of Thailand. Economic development and education enabled the rise of a middle class in Bangkok and other cities. In October 1971, there was a large demonstration against the dictatorship of Thanom Kittikachorn (premiership 1963–1973), which led to civilian casualties. Bhumibol installed Sanya Dharmasakti (premiership 1973–1975) to replace him, marking the first time that the king had intervened in Thai politics directly since 1932. The aftermath of the event marked a short-lived parliamentary democracy, often called the "era when democracy blossomed" (ยุคประชาธิปไตยเบ่งบาน).
Association football has overtaken Muay Thai as the most widely followed sport in Thailand. The Thailand national football team has played the AFC Asian Cup six times and reached the semifinals in 1972. The country has hosted the Asian Cup twice, in 1972 and in 2007. The 2007 edition was co-hosted together with Indonesia, Malaysia and Vietnam. Another widely enjoyed pastime, and once a competitive sport, is kite flying.
Constant unrest and instability, as well as fear of a communist takeover after the fall of Saigon, made some ultra-right groups brand leftist students as communists. This culminated in the Thammasat University massacre in October 1976. A coup d'état on that day brought Thailand a new ultra-right government, which cracked down on media outlets, officials, and intellectuals, and fuelled the communist insurgency. Another coup the following year installed a more moderate government, which offered amnesty to communist fighters in 1978.
Forty-nine per cent of Thailand's labour force is employed in agriculture. This is down from 70% in 1980. Rice is the most important crop in the country and Thailand had long been the world's leading exporter of rice, until recently falling behind both India and Vietnam. Thailand has the highest percentage of arable land, 27.25%, of any state in the Greater Mekong Subregion. About 55% of the arable land area is used for rice production.
Fuelled by Indochina refugee crisis, Vietnamese border raids and economic hardships, Prem Tinsulanonda became the Prime Minister from 1980 to 1988. The communists abandoned the insurgency by 1983. Prem's premiership was dubbed "semi-democracy" because the Parliament was composed of all elected House and all appointed Senate. The 1980s also saw increasing intervention in politics by the monarch, who rendered two coups in 1981 and 1985 attempts against Prem failed. In 1988 Thailand had its first elected prime minister since 1976.
Suchinda Kraprayoon, who was the coup leader in 1991 and said he would not seek to become prime minister, was nominated as one by the majority coalition government after the 1992 general election. This caused a popular demonstration in Bangkok, which ended with a bloody military crackdown. Bhumibol intervened in the event and signed an amnesty law, Suchinda then resigned.
In Bangkok, there were two failed rapid rail projects Lavalin Skytrain and Bangkok Elevated Road and Train System, before Mass Rapid Transit Master Plan in Bangkok Metropolitan Region was endorsed by the cabinet on 27 September 1994 and implemented from 1995 to the present.
In 1995, as minister of education, Sukavich Rangsitpollaid out his plans for educational reform in Thailand. The goal of education reform is to realize the potential of Thai people to develop themselves for the better quality of life and to develop the nation for peaceful co-existence in the world community. The reform was considered a landmark movement after nearly 100 years of education under the previous system.
Thailand has a diverse and robust informal labour sector—in 2012, it was estimated that informal workers comprised 62.6% of the Thai workforce. The Ministry of Labour defines informal workers to be individuals who work in informal economies and do not have employee status under a given country's Labour Protection Act (LPA). The informal sector in Thailand has grown significantly over the past 60 years over the course of Thailand's gradual transition from an agriculture-based economy to becoming more industrialised and service-oriented. Between 1993 and 1995, ten per cent of the Thai labour force moved from the agricultural sector to urban and industrial jobs, especially in the manufacturing sector. It is estimated that between 1988 and 1995, the number of factory workers in the country doubled from two to four million, as Thailand's GDP tripled. While the Asian Financial Crisis that followed in 1997 hit the Thai economy hard, the industrial sector continued to expand under widespread deregulation, as Thailand was mandated to adopt a range of structural adjustment reforms upon receiving funding from the IMF and World Bank. These reforms implemented an agenda of increased privatisation and trade liberalisation in the country, and decreased federal subsidisation of public goods and utilities, agricultural price supports, and regulations on fair wages and labour conditions. These changes put further pressure on the agricultural sector, and prompted continued migration from the rural countryside to the growing cities. Many migrant farmers found work in Thailand's growing manufacturing industry, and took jobs in sweatshops and factories with few labour regulations and often exploitative conditions.
Thailand ranks world's sixth, and Asia's first in the 2019 Global Health Security Index of global health security capabilities in 195 countries, making it the only developing country on the world's top ten. Thailand had 62 hospitals accredited by Joint Commission International. In 2002, Bumrungrad became the first hospital in Asia to meet the standard.
Prostitution in Thailand and sex tourism also form a de facto part of the economy. Campaigns promote Thailand as exotic to attract tourists. One estimate published in 2003 placed the trade at US $4.3 billion per year or about 3% of the Thai economy. It is believed that at least 10% of tourist dollars are spent on the sex trade.
During Thaksin Shinawatra's premiership, negotiations for several free trade agreements with China, Australia, Bahrain, India, and the US were initiated. Thaksin sought to position Thailand as a regional leader, initiating various development projects in poorer neighbouring countries. More controversially, he established close, friendly ties with the Burmese dictatorship. Thailand joined the US-led invasion of Iraq, sending a humanitarian contingent until September 2004. Thailand also had contributed troops to reconstruction efforts in Afghanistan.
Rugby is also a growing sport in Thailand with the Thailand national rugby union team rising to be ranked 61st in the world. Thailand became the first country in the world to host an international 80 welterweight rugby tournament in 2005. The national domestic Thailand Rugby Union (TRU) competition includes several universities as well as local sports clubs like the British Club of Bangkok, the Southerners Sports Club (Bangkok) and the Royal Bangkok Sports Club.
The Thai Armed Forces have a combined manpower of 306,000 active duty personnel and another 245,000 active reserve personnel. The head of the Thai Armed Forces (จอมทัพไทย, Chom Thap Thai) is the king, although this position is only nominal. The armed forces are managed by the Ministry of Defence of Thailand, which is headed by the Minister of Defence (a member of the cabinet of Thailand) and commanded by the Royal Thai Armed Forces Headquarters, which in turn is headed by the Chief of Defence Forces of Thailand. Thai annual defense budget almost tripled from 1.98 billion USD in 2005 to 5.88 billion USD in 2016, accounting for approximately 1.4% of GDP. Thailand ranked 16th worldwide in the Military Strength Index based on the Credit Suisse report in September 2015.
Apart from a brief period of parliamentary democracy in the mid-1970s and 1990s, Thailand has periodically alternated between democracy and military rule. Since the 2000s, the country has been caught in continual bitter political conflict between supporters and opponents of Thaksin Shinawatra, which resulted in two coups (in 2006 and 2014), along with the establishment of its current constitution, a nominally democratic government after the 2019 Thai general election, and large pro-democracy protests in 2020–2021, which included unprecedented demands to reform the monarchy. Since 2019, it has been nominally a parliamentary constitutional monarchy; in practice, however, structural advantages in the constitution have ensured the military's continued influence in politics.
The 1997 Asian financial crisis originated in Thailand and ended the country's 40 years of uninterrupted economic growth. Chuan Leekpai's government took an IMF loan with unpopular provisions. The populist Thai Rak Thai party, led by prime minister Thaksin Shinawatra, governed from 2001 until 2006. His policies were successful in reducing rural poverty and initiated universal healthcare in the country. A South Thailand insurgency escalated starting from 2004. The 2004 Indian Ocean earthquake and tsunami hit the country, mostly in the south. Massive protests against Thaksin led by the People's Alliance for Democracy (PAD) started in his second term as prime minister and his tenure ended with a coup d'état in 2006. The junta installed a military government which lasted a year.
In 2007, a civilian government led by the Thaksin-allied People's Power Party (PPP) was elected. Another protest led by PAD ended with the dissolution of PPP, and the Democrat Party led a coalition government in its place. The pro-Thaksin United Front for Democracy Against Dictatorship (UDD) protested both in 2009 and in 2010, the latter of which ended with a violent military crackdown causing more than 70 civilian deaths.
Increasing numbers of migrants from neighbouring Myanmar, Laos, and Cambodia, as well as from Nepal and India, have pushed the total number of non-national residents to around 3.5 million as of 2009 , up from an estimated 2 million in 2008. Some 41,000 Britons and 20,000 Australians live in Thailand.
Health and medical care is overseen by the Ministry of Public Health (MOPH), with total national expenditures on health amounting to 4.3 per cent of GDP in 2009. Non-communicable diseases form the major burden of morbidity and mortality, while infectious diseases including malaria and tuberculosis, as well as traffic accidents, are also important public health issues.
In April 2009, the Cambodian–Thai border dispute brought troops on territory immediately adjacent to the 900-year-old ruins of Cambodia's Preah Vihear Hindu temple near the border.
Thai nationals make up the majority of Thailand's population, 95.9% in 2010. The remaining 4.1% of the population are Burmese (2.0%), others 1.3%, and unspecified 0.9%.
Thailand ranks as the worlds fifth largest medical tourism destination in spending, according to the World Travel and Tourism Council, attracting over 2.5 million visitors in 2018, and is number one in Asia. The country is popular for the growing practice of sex reassignment surgery (SRS) and cosmetic surgery. In 2010–2012, more than 90% of medical tourists traveled to Thailand for SRS.
Thais have median wealth per one adult person of $1,469 in 2016, increasing from $605 in 2010. In 2016, Thailand was ranked 87th in Human Development Index, and 70th in the inequality-adjusted HDI.
The entertainment industries are estimated to have directly contributed $2.1 billion in gross domestic product (GDP) to the Thai economy in 2011. They also directly supported 86,600 jobs. Amongst several Dance-pop artists who have made internationally successful can be mentioned "Lisa" Lalisa Manoban and Tata Young.
In 2013, the Ministry of Information and Communication Technology announced that 27,231 schools would receive classroom-level access to high-speed internet. However, the country's educational infrastructure was still underprepared for online teaching, as smaller and more remote schools were particularly hindered by COVID-19 restrictions.
Thailand was the most visited country in Southeast Asia in 2013, according to the World Tourism Organization. Estimates of tourism receipts directly contributing to the Thai GDP of 12 trillion baht range from 9 percent (1 trillion baht) (2013) to 16 percent. When including the indirect effects of tourism, it is said to account for 20.2 percent (2.4 trillion baht) of Thailand's GDP.
75% of Thailand's electrical generation is powered by natural gas in 2014. Coal-fired power plants produce an additional 20% of electricity, with the remainder coming from biomass, hydro, and biogas.
After the general election of 2011, the populist Pheu Thai Party won a majority and Yingluck Shinawatra, Thaksin's younger sister, became prime minister. The People's Democratic Reform Committee organised another anti-Shinawatra protest after the ruling party proposed an amnesty bill which would benefit Thaksin. Yingluck dissolved parliament and a general election was scheduled, but was invalidated by the Constitutional Court. The crisis ended with another coup d'état in 2014.
In 2014, Credit Suisse reported that Thailand was the world's third most unequal country, behind Russia and India. The top 10% richest held 79% of the country's assets. The top 1% held 58% of the assets. The 50 richest Thai families had a total net worth accounting to 30% of GDP. Bank of Thailand reported that during 2006–16, Thailand's top 5% largest companies had 85% of all corporate revenue in the nation, and only 6% of the country's companies were in export industries, which made up 60% of the country's GDP.
Most of the vehicles built in Thailand are developed and licensed by foreign producers, mainly Japanese and American. The Thai car industry takes advantage of the ASEAN Free Trade Area (AFTA) to find a market for many of its products. Eight manufacturers, five Japanese, two US, and Tata of India, produce pick-up trucks in Thailand. As of 2012, due to its favorable taxation for 2-door pick-ups at only 3–12% against 17–50% for passenger cars, Thailand was the second largest consumer of pick-up trucks in the world, after the US. In 2014, pick-ups accounted for 42% of all new vehicle sales in Thailand.
Thailand's youth literacy rate was 98.1% in 2015. Education is provided by a well-organised school system of kindergartens, primary, lower secondary and upper secondary schools, numerous vocational colleges, and universities. Education is compulsory up to and including age 14, while the government is mandated to provide free education through to age 17. The establishment of reliable and coherent curricula for its primary and secondary schools is subject to rapid changes. Issues concerning university entrance has been in constant upheaval for a number of years. The country is also one of the few that still mandates uniform up to the university years, which is still a subject of ongoing debate. The quality of education in the country is often questioned.
Furthermore, access to biocapacity in Thailand is lower than world average. In 2016, Thailand had 1.2 global hectares of biocapacity per person within its territory, a little less than world average of 1.6 global hectares per person. In contrast, in 2016, they used 2.5 global hectares of biocapacity – their ecological footprint of consumption. This means they use about twice as much biocapacity as Thailand contains, resulting in a deficit.
In 2016, 5.81 million people lived in poverty, or 11.6 million people (17.2% of population) if "near poor" is included. The proportion of the poor relative to total population in each region was 12.96% in the Northeast, 12.35% in the South, and 9.83% in the North. In 2017, there were 14 million people who applied for social welfare (yearly income of less than ฿100,000 was required). In the first quarter of 2023, Thai household debts totaled 14.6 trillion baht or 89.2% of GDP; the average debt per household was approximately 500,000 baht. In 2016, there were estimated 30,000 homeless persons in the country.
In 2017, the Thai economy grew an inflation-adjusted 3.9%, up from 3.3% in 2016, marking its fastest expansion since 2012. High public spending, especially during the COVID-19 pandemic, prompted the authorities to raise Thailand's public debt ceiling from 60% to 70% of GDP.
Thailand has a mediocre but improving performance in the global Environmental Performance Index (EPI) with an overall ranking of 91 out of 180 countries in 2016. The environmental areas where Thailand performs worst (i.e., highest-ranking) are air quality (167), environmental effects of the agricultural industry (106), and the climate and energy sector (93), the later mainly because of a high CO2 emission per kWh produced. Thailand performs best (i.e., lowest-ranking) in water resource management (66), with some major improvements expected for the future, and sanitation (68). The country had a 2019 Forest Landscape Integrity Index mean score of 6.00/10, ranking it 88th globally out of 172 countries.
The ensuing National Council for Peace and Order, a military junta led by General Prayut Chan-o-cha, led the country until 2019. Civil and political rights were restricted, and the country saw a surge in lèse-majesté cases. Political opponents and dissenters were sent to "attitude adjustment" camps; this was described by academics as showing the rise of fascism. Bhumibol, the longest-reigning Thai king, died in 2016, and his son Vajiralongkorn ascended to the throne. The referendum and adoption of Thailand's current constitution happened under the junta's rule. The junta also bound future governments to a 20-year national strategy 'road map' it laid down, effectively locking the country into military-guided democracy. In 2019, the junta agreed to schedule a general election in March. Prayut continued his premiership with the support of Palang Pracharath Party-coalition in the House and junta-appointed Senate, amid allegations of election fraud. The 2020–21 pro-democracy protests were triggered by increasing royal prerogative, democratic and economic regression from the Royal Thai Armed Forces supported by the Thai monarchy in the wake of the 2014 Thai coup d'état, dissolution of the pro-democracy Future Forward Party, distrust in the 2019 general election and the current political system, forced disappearance and deaths of political activists including Wanchalearm Satsaksit, and political corruption scandals, which brought forward unprecedented demands to reform the monarchy and the highest sense of republicanism in the country.
A hereditary monarch serves as Thailand's head of state. The current King of Thailand is Vajiralongkorn (or Rama X), who has reigned since October 2016. The powers of the king are limited by the constitution and he is primarily a symbolic figurehead. However, the monarch still occasionally intervenes in Thai politics, as all constitutions pave the way for customary royal rulings. Some academics outside Thailand, including Duncan McCargo and Federico Ferrara, noted extraconstitutional role of the monarch through a "network monarchy" behind the political scenes. The monarchy is protected by the severe lèse majesté law, even though the people's attitude towards the institution varies from one reign to another.
In 2017, Thailand signed and ratified the UN Treaty on the Prohibition of Nuclear Weapons.
In 2017, Thailand's median household income was ฿26,946 per month. Top quintile households had a 45.0% share of all income, while bottom quintile households had 7.1%. There were 26.9 million persons who had the bottom 40% of income earning less than ฿5,344 per person per month. During the 2013–2014 Thai political crisis, a survey found that anti-government PDRC mostly (32%) had a monthly income of more than ฿50,000, while pro-government UDD mostly (27%) had between ฿10,000 and ฿20,000.
In 2017, seven Thai dishes appeared on a list of the "World's 50 Best Foods"— an online worldwide poll by CNN Travel. Thailand had more dishes on the list than any other country. They were: tom yam goong (4th), pad Thai (5th), som tam (6th), massaman curry (10th), green curry (19th), Thai fried rice (24th) and mu nam tok (36th). Two desserts were also listed in CNN's 50 Best Desserts Around The World: mango sticky rice and tub tim krob.
Muslims constitute the second largest religious group in Thailand, comprising 5.37% of the population in 2018. Islam is concentrated mostly in the country's southernmost provinces: Pattani, Yala, Satun, Narathiwat, and part of Songkhla Chumphon, which are predominantly Malay, most of whom are Sunni Muslims. Christians represented 1.13% of the population in 2018, with the remaining population consisting of Hindus and Sikhs, who live mostly in the country's cities. There is also a small but historically significant Jewish community in Thailand dating back to the 17th century.
In December 2018 the interim parliament voted to legalise the use of cannabis for medical reasons, making Thailand the first Southeast Asian country to allow the use of medical cannabis.
Thailand ranked 43rd in the Global Innovation Index in 2023. The Ministry of Higher Education, Science, Research and Innovation and its agencies oversees the development of science, technology, and research in Thailand. According to the National Research Council of Thailand, the country devoted 1.1% of its GDP to the research and development of science in 2019, with over 166,788 research and development personnel in full-time equivalent that year.
Tourism makes up about 6% of the country's economy. Prior to the pandemic, Thailand was the world's eighth most visited country according to the World Tourism rankings compiled by the United Nations World Tourism Organization. In 2019, Thailand received 39.8 million international tourists, ahead of United Kingdom and Germany and was the fourth highest in international tourism earning 60.5 billion US dollars.
According to the constitution, serving in the armed forces is a duty of all Thai citizens. Thailand still use active draft system for males over the age of 21. They are subjected to varying lengths of active service depending on the duration of reserve training as Territorial Defence Student and their level of education. Those who have completed three years or more of reserve training will be exempted entirely. The practice has long been criticized, as some media question its efficacy and value. It is alleged that conscripts end up as servants to senior officers or clerks in military cooperative shops. In a report issued in March 2020, Amnesty International charged that Thai military conscripts face institutionalised abuse systematically hushed up by military authorities.
During the Israel-Hamas military conflict in 2023, at first Thailand's prime minister stated that his government strongly condemns the attack against Israel and extends its deepest condolences to the government and the people of Israel but the government later changed its position and announced that Thailand adopted a neutral stance in this conflict. 28 Thai nationals were killed in this conflict.
In May 2023, Thailand's reformist opposition,the progressive Move Forward Party (MFP) and the populist Pheu Thai Party, won the general election, meaning the royalist-military parties that supported Prime Minister Prayuth Chan-ocha lost power. On 22 August 2023, Srettha Thavisin of the populist Pheu Thai party, became Thailand's new prime minister, while the Pheu Thai party's billionaire figurehead Thaksin Shinawatra returned to Thailand after years in self-imposed exile.