The document summarizes some of the key reasons for conflict between the Sinhalese and Tamil ethnic groups in Sri Lanka. It discusses how citizenship rights excluded many Indian Tamils in 1948. While India helped some become citizens in 1964, around 100,000 remained stateless. It also describes how the switch to Sinhala as the sole administrative language in 1956 disadvantaged Tamil government workers and students. Subsequent changes to university admissions criteria in the 1970s further reduced the percentage of Tamil students entering engineering and medical programs. The resettlement of Sinhalese peasants into Tamil areas was another policy that increased resentment.