The origins of the Sri Lankan Civil War lie in the continuous political rancor between the majority Sinhalese and the minority Tamils. The roots of the modern conflict lie in the British colonial rule when the country was known as Ceylon. There was initially little tension among Sri Lanka's two largest ethnic groups, the Sinhalese and the Tamils, when Ponnambalam Arunachalam, a Tamil, was appointed representative of the Sinhalese as well as the Tamils in the national legislative council. In 1919 major Sinhalese and Tamil political organizations united to form the Ceylon National Congress, under the leadership of Arunachalam, to press the colonial government for more constitutional reforms. However, British Gov. William Manning actively encouraged the concept of "communal representation" and created the Colombo town seat in 1920, which alternated between the Tamils and the Sinhalese.