Prehistory and origins There is evidence of continuous human habitation in present-day Thailand from 20,000 years ago to the present day. The earliest evidence of rice growing is dated at 2,000 BCE. Areas comprising what is now Thailand participated in the Maritime Jade Road, as ascertained by archeological research. The trading network existed for 3,000 years, between 2000 BCE to 1000 CE. Bronze appeared –1,000 BCE. Iron appeared around 500 BCE. The
Thai people are of the
Tai ethnic group, characterised by common linguistic roots. Chinese chronicles first mention the Tai peoples in the 6th century BCE. While there are many assumptions regarding the origin of Tai peoples,
David K. Wyatt, a historian of Thailand, argued that their ancestors who at present inhabit Laos, Thailand, Myanmar, India, and China came from the
Điện Biên Phủ area between the 5th and the 8th century. Thus Thai culture was influenced by Indian, Mon, and Khmer cultures. Tai people intermixed with various ethnic and cultural groups in the region, resulting in many groups of present-day Thai people. Genetic evidences suggested that ethnolinguistics could not accurately predict the origins of the Thais. According to French historian
George Cœdès, "The Thai first enter history of
Farther India in the eleventh century with the mention of
Syam slaves or prisoners of war in
Champa epigraphy", and "in the twelfth century, the
bas-reliefs of
Angkor Wat" where "a group of warriors" are described as
Syam, The origins and ethnicity of the
Syam remain unclear, with some literature suggesting that
Syam refers to the
Shan people, the
Bru people, or the
Brau people. However,
Mainland Southeast Asian sources from before the fourteenth century primarily used the word
Syam as an
ethnonym, referring to those who belonged to a separate cultural category different from the Khmer, Cham, Bagan, or Mon. This contrasts with the Chinese sources, where
Xian was used as a
toponym. However, after several bloody centuries against
Chinese influence in
Guangxi between 333 BCE and the 11th century, hundreds of thousands of Tais were killed, thus,
Tai people began to move southwestward along the rivers and over the lower passes into the mountain north of
Southeast Asia and river valleys in present-day
Assam of
India. Some evidence indicates that the ancestors of Tai people migrated en masse southwestwards out of Yunnan only after the 1253
Mongol invasion of Dali; however, it is not generally accepted. Tais defeated
indigenous tribes and emerged as the new power in the new region. As a result, several Tai city-states were established, scattered from
Điện Biên Phủ in present-day northwestern
Vietnam and highland
Southeast Asia to
northeastern India. According to the
Simhanavati legend given in several chronicles, the first Tai city-state in northern Thailand,
Singhanavati, was founded around the 7th century. However, several modern
geology and
archaeology studies found that its centre, Yonok Nahaphan, dates from 691 BCE–545 CE; this roughly coincides with the establishment of
Shan States, another Tai's federated principalities in the present-day northeast
Myanmar. as well as
Muang Sua (
Luang Prabang) in the east. After Singhanavati was submerged below
Chiang Saen Lake due to an
earthquake in 545, the survivors then founded a new seat at . The kingdom lasted for another 93 years. In addition to
Singhanavati, another northern principality probably related to the Tai people,
Ngoenyang, was established as the successor of Singhanavati in 638 by , also centred in (present-day
Mae Sai District,
Chiang Rai). In the late tenth 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, eventually launching 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.
Phrom also marched the troops south to occupy
Chakangrao from the enemy as well as founding the city of
Songkwae. In contrast,
Tai people instead established relationships with Mon via
royal intermarriages. Samuel Beal discovered the polity among the Chinese writings on Southeast Asia as "Duoluobodi". During the early 20th century, archaeological excavations led by
George Coedès found
Nakhon Pathom Province to be a centre of Dvaravati culture. The two most important sites were Nakorn Pathom and U Thong (in modern
Suphan Buri Province). The inscriptions of Dvaravati were in
Sanskrit and
Mon using the script derived from the
Pallava alphabet of the
South Indian Pallava dynasty. It is believed that the Dvaravati borrowed
Theravada Buddhism through its contacts with Sri Lanka, while the ruling class participated in
Hindu rites.
Dvaravati art, including the Buddha sculptures and
stupas, showed strong similarities to those of the
Gupta Empire of India. The eastern parts of the Chao Phraya valley were subjected to a more Khmer and Hindu influence as the inscriptions are found in Khmer and Sanskrit. Dvaravati was a network of city-states paying tribute to more powerful ones according to the
mandala political model. Dvaravati culture expanded into
Isan as well as south as far as the
Kra Isthmus. Dvaravati culture lost its influence around the tenth century when they submitted to the more unified Lavo-Khmer polity. Around the tenth century, the city-states of Dvaravati merged into the mandalas of:
Lavo (modern
Lopburi) and
Suvarnabhumi (modern
Suphan Buri). According to a legend in the Northern Chronicles, in 903, a king of
Tambralinga invaded and took Lavo and installed a Malay prince on the Lavo throne. The Malay prince was married to a Khmer princess who had fled an Angkorian dynastic bloodbath. The son of the couple contested the Khmer throne and became
Suryavarman I (1006–1050), thus bringing Lavo under Khmer domination through marital union. Suryavarman I also expanded into the
Khorat Plateau (later styled "Isan"), constructing many temples. , a 13th-century Angkorian temple in
Lopburi. After the
Angkor lost Lavo to
Suphannabhum princes in 1052, the younger prince
Chandrachota claimed the throne. His son,
Narai I, moved Lavo's seat to
Ayodhya in the 1080s. This resulted in the throne of Lavo's Lavaburi being vacant from 1087 to 1106 (or ruled by unknown kings),
Si Satchanalai king,
Kesariraja who is of
Mon's
Chaliang and
Tai's
Chiang Saen lineages, took over the seat. An attempt to re-expand influence to Lavo by the Angkor occurred in 1181 when
Jayavarman VII appointed his lineage Narupatidnavarman to govern Lavapura. Due to this political pressure, a Tai ruler Sri Thammasokkarat (), who was also from Si Satchanalai, fled to
Nakhon Si Thammarat. Sri Thammasokkarat married to princess of Dhanyapura (Dong Mae Nang Mueang in the present-day
Nakhon Sawan province), and their descendants ruled
Tambralinga until the late 13th century.
The Customs of Cambodia of
Zhou Daguan, as an official delegation sent by the
Yuan dynasty to
Angkor from 1296 to 1297, says the Siamese people exerted significant influence over Lavo's
Lavapura and appeared in huge numbers in the Angkorian capital of
Yaśodharapura.
Prang Sam Yot was built during this period. All of the turmoil, as mentioned earlier, also led to the independence declaration of the
Sukhothai Kingdom in 1238.
The earliest evidence mentioning the Siamese The earliest evidence to mention the Siam people are stone inscriptions found in
Angkor Borei of
Funan (K.557 and K.600), dated 661 CE, the slave's name is mentioned as "Ku Sayam" meaning "Sayam female slaves" (Ku is a prefix used to refer to female slaves in the pre-Angkorian era), and the Takéo inscriptions (K.79) written in 682 during the reign of
Bhavavarman II of
Chenla also mention Siam Nobel:
Sāraṇnoya Poña Sayam, which was transcribed into English as:
the rice field that was given to the poña (noble rank) who was called Sayam (Siam). The
Song Huiyao Jigao (960–1279) indicate Siamese people settled in the west
central Thailand and their state was called
Xiān guó (), while the eastern plain belonged to the Mon of
Lavo (), who later fell under the
Chenla and
Khmer hegemony around the 7th–9th centuries. Those Mon political entities, which also included
Haripuñjaya in the north and several city-states in the
northeast, are collectively called
Dvaravati. However, the states of Siamese and Lavo were later merged via the
royal intermarriage and became
Ayutthaya Kingdom in the mid-14th century, The remaining principal city-states in
Isan region became
Lan Xang around 1353 after the twin cities of
Muang Sua (
Luang Prabang) and
Vieng Chan Vieng Kham (
Vientiane) became independent following the death of the
Sukhothai king
Ram Khamhaeng. 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 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 centre to
Angkor, both Siamese 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).
Sukhothai Kingdom (1238–1438) {{multiple image After the decline of the Khmer Empire and
Kingdom of Pagan in the early 13th century, various states thrived in their place. The domains of Tai people existed from the northeast of present-day India to the north of present-day Laos and to the
Malay Peninsula. Its initial expansion was through conquest and political marriage. Before the end of the 15th century, Ayutthaya invaded the Khmer Empire three times and sacked its capital
Angkor. Ayutthaya then became a regional power in place of the Khmer. Constant interference of Sukhothai effectively made it a vassal state of Ayutthaya and it was finally incorporated into the kingdom.
Borommatrailokkanat brought about bureaucratic reforms which lasted into the 20th century and created a system of social hierarchy called
sakdina, where male commoners were conscripted as
corvée labourers for six months a year. Ayutthaya was interested in the
Malay Peninsula but failed to conquer the
Malacca Sultanate, which was supported by the Chinese
Ming dynasty. 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. Ayutthaya sought to improve relations with European powers for many successive reigns. The kingdom especially prospered during cosmopolitan
Narai's reign (1656–1688), when some European travellers regarded Ayutthaya as an Asian great power, alongside China and India. 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.
Thonburi Kingdom (1767–1782) The capital and many of its territories lay in chaos after the war. The former capital was occupied by the
Burmese garrison army and five local leaders declared themselves overlords, including the lords of Sakwangburi,
Phitsanulok,
Pimai,
Chanthaburi, and
Nakhon Si Thammarat.
Chao Tak, a capable military leader, proceeded to make himself a lord by
right of conquest, beginning with the legendary sack of
Chanthaburi. Based at Chanthaburi, Chao Tak raised troops and resources, and sent a fleet up the
Chao Phraya to take the fort of
Thonburi. In the same year, Chao Tak was able to retake Ayutthaya from the Burmese only seven months after the fall of the city. 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,
Rattanakosin Kingdom and modernisation (1782–1932) {{multiple image 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. The unexpected death of Mongkut from
malaria led to the reign of underage King
Chulalongkorn, with
Somdet Chaophraya Sri Suriwongse (Chuang Bunnag) acting as regent. 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. The Thai government then declared war on the United States and the United Kingdom. The
Free Thai Movement was launched both in Thailand and abroad to oppose the Thai government and Japanese occupation. Field Marshal
Sarit Thanarat took power by coup in 1957, and he proceeded to reverse Phibun's democratic reforms and ban the Khana Ratsadon party from politics. His rule from 1959 to 1963 was autocratic; he built his legitimacy around the god-like status of the monarch and by channelling the government and public's loyalty to the king. The aftermath of the event marked a short-lived parliamentary democracy, Military figure
Prem Tinsulanonda was appointed Prime Minister from in 1980. He oversaw the beginning of a period of significant economic growth and democratisation throughout the 1980s. Prem's premiership was often referred to as "premocracy" because it involved
semi-democratic practices such as a Parliament composed of an all-elected House and an all-appointed Senate. Prem's
constitutionalist political approach aided with a transition away from military rule and a negotiated end to the Communist insurgency by 1983. He maintained political stability via a close relationship with
King Bhumibol, who helped to foil two military coups in attempts against Prem in
1981 and in
1985. In 1988, Thailand saw its first freely-elected prime minister since the 1976 coup.
Chatichai Choonhavan ruled for 3 years before being overthrown in a coup that ushered in two years of military rule under the
National Peace Keeping Council. One of the coup leaders,
Suchinda Kraprayoon, was nominated as prime minister for the majority coalition government after the
March 1992 general election. This caused a popular demonstration in Bangkok, which ended with a bloody military crackdown known as
Black May. The King intervened in the event, granting amnesty to the belligerents and forcing the resignation of Suchinda. Free elections were once again held in September 1992, bringing the
neoliberal Democrat Party to power. Power passed between various neoliberal parties throughout the decade, who all had a hand in drafting the
1997 "People's Constitution." Spurred on by the events of Black May, the constitution explicitly acknowledged several
human rights and established several government and electoral accountability measures, including the creation of a fully-elected
bicameral legislature.
Shinawatra era (2001–present) The neoliberal government's attempt to
peg the
Thai baht to the
United States dollar induced the
1997 Asian financial crisis, crashing regional economies and ending nearly 40 years of uninterrupted economic growth in Thailand. To cover a shortage of foreign currency and investments, which had come primarily from Japan,
Chavalit Yongchaiyudh's government took out a $17 billion
International Monetary Fund loan in US dollars. To satisfy the conditions of the loan, Thailand underwent a series of
austerity measures until the loan was repaid in 2003. The crisis brought on the ascendancy of the populist
Thai Rak Thai party, whose base consisted primarily of indebted rural workers. Its prime minister
Thaksin Shinawatra governed from 2001 until 2006. His policies were successful in reducing rural poverty and providing
universal healthcare. However, Thaksin was viewed by opponents among the Thai upper and upper middle classes as a corrupt populist who was destroying the middle class in order to favour himself and the rural poor. Additionally, his rural poverty policies directly conflicted with King Bhumibol's recommendations, drawing the ire of royalists, a powerful faction in Thailand. Thaksin also faced crises in the form of the
South Thailand insurgency, which escalated starting from 2004, and the
2004 Indian Ocean earthquake and tsunami which claimed around 8,000 lives in Thailand. Massive protests against Thaksin led by the
reactionary People's Alliance for Democracy (PAD) started in his second term as prime minister, and the monarchy and the military eventually agreed to oust him. The
crisis peaked in 2005 with a series of controversies surrounding Buddhist and monarchic institutions, and the army dissolved Thaksin's party with
a coup d'état in 2006 and banned over a hundred of its executives from politics. After the coup, a military government was installed for one year.'''''' , Red Shirts,
protest in 2010 The military government faced significant resistance, with protesters frequently storming government buildings and elements within the military threatening yet another coup.''' After
the general election of 2011, the
populist Pheu Thai Party won a majority.
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 her decision was invalidated by the
Constitutional Court. The
crisis ended with
another coup d'état in 2014. 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 indicating the return of fascism to Thailand. 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 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. An extended two-year period of
pro-democracy protests were subsequently triggered by distrust in the election as well as increasing
royal prerogative, democratic and economic regression under monarchy-supported military rule, retaliatory dissolution of the pro-democracy
Future Forward Party, regressive policies on political issues like women's and labour rights, forced disappearances and deaths of political activists like
Wanchalearm Satsaksit, and various political corruption scandals including
1MDB. The protests brought forward unprecedented demands to reform the monarchy and the highest sense of
republicanism in the country's history. In May 2023, Thailand's reformist opposition – the progressive
Move Forward Party (MFP) and Thaksin's populist Pheu Thai Party – won the
general election, ending 9 years of royalist-military rule under Prayut. On 22 August 2023,
Srettha Thavisin of the Pheu Thai party became Thailand's new prime minister, while the ex-PM and party figurehead Thaksin Shinawatra returned to Thailand after years in self-imposed exile from the military regime. Thavisin was later dismissed from his prime ministerial role on 14 August 2024 by the
Constitutional Court for "gross ethics violations". He was succeeded by Thaksin's daughter
Paetongtarn Shinawatra, who spent a year in office before the Constitutional Court ordered her removal over a controversial phone call with Cambodia's president. The Court then ordered the arrest of Thaksin in September 2025. == Geography ==