Overview
Thai history opens with the bronze-working Ban Chiang culture of the northeast, whose bronze is commonly dated from c. 1500 BC; the site was inscribed as UNESCO World Heritage in 1992. Mon Dvaravati Buddhist polities flourished from the 6th to the 11th century, and the Khmer Empire (Angkor) later controlled much of the center and northeast. The arrival and rise of the Tai peoples then produced the kingdoms that shaped the Siamese state: Sukhothai (trad. 1238), Lan Na (1296), and Ayutthaya (1351). Three continuities run through every era: Theravada Buddhism, the monarchy, and the wet-rice agriculture of the Chao Phraya basin. Thailand — called Siam until renamed in 1939 — is the only Southeast Asian state never colonized by a European power, an independence preserved through 19th-century treaty diplomacy and territorial concessions.
The major eras
Early Thailand covers prehistory, Dvaravati, the Khmer era, and the Tai migration. Sukhothai (trad. 1238–1438) is honored as the cradle of the Thai script and state Theravada Buddhism, while Lan Na (1296–1775) built a distinct northern kingdom at Chiang Mai. Ayutthaya (1351–1767) carried Siamese power and cosmopolitan trade for four centuries; after its fall, Taksin reunified the country from Thonburi (1767–1782). The Rattanakosin (Bangkok) era (1782–1932) brought Chakri-dynasty absolute monarchy and modernization under Mongkut and Chulalongkorn. Since the revolution of 1932 — the country was renamed Thailand in 1939 — a constitutional era has alternated military and elected rule; a US ally that weathered the 1997 financial crisis, Thailand is today among Southeast Asia’s largest economies, a constitutional monarchy under the Chakri dynasty.