Thailand was formerly known as Siam and has never been colonized. It is a constitutional monarchy currently ruled by King Bhumibol Adulyadej, who has reigned since 1946 and is the world's longest serving monarch. Thailand has a population of around 66 million and Bangkok is the capital and largest city. Buddhism is the dominant religion and Thai culture has been influenced by Indian and Chinese traditions. The Thai economy relies on agriculture, particularly rice, as well as tourism. In 2014, the Thai military seized power in a coup due to ongoing political protests and unrest.