Ethnic groups in Burundi include the three main indigenous groups of Hutu, Tutsi and Twa that have largely been emphasized in the study of the country's history due to their role in shaping it through conflict and consolidation. Burundi's ethnic make-up is similar to that of neighboring Rwanda. Additionally, recent immigration has also contributed to Burundi's ethnic diversity. Throughout the country's history, the relation between the ethnic groups has varied, largely depending on internal political, economic and social factors and also external factors such as colonialism. The pre-colonial era, despite having divisions between the three groups, saw greater ethnic cohesion and fluidity dependent on socioeconomic factors. During the colonial period under German and then Belgian rule, ethni