The population is young and predominantly rural, with a density among the highest in Africa. Rwandans are drawn from just one cultural and linguistic group, the Banyarwanda. Christianity is the largest religion in the country; the principal language is Kinyarwanda, spoken by most Rwandans, with English and French serving as official languages. Rwanda has a presidential system of government. Rwanda today has low corruption compared with neighbouring countries, although human rights organisations report suppression of opposition groups, intimidation and restrictions on freedom of speech.