The post of prime minister has existed since 1932, after a bloodless revolution forced the absolutist King Prajadhipok to grant for the people of Siam their first constitution. Under the newly established constitutional monarchy, the first prime minister of Siam was Phraya Manopakorn Nititada. At first, the office was called the President of the People's Committee, it was later changed to Prime Minister of Siam when the king deemed it too communistic.