Arusha is a major international diplomatic hub. The city hosts and is regarded as the de facto capital of the East African Community. Since 1994, the city has also hosted the International Criminal Tribunal for Rwanda. It is a multicultural city with a majority Tanzanian population of mixed backgrounds: indigenous Bantu, Arab-Tanzanian and Indian-Tanzanian population, plus small White European and white American minority population. Religions of the Arushan population are Christian, Jewish, Muslim, and Hindu.
The current site of Arusha was first settled in the 1830s by the agro-pastoral Arusha Maasai from the Arusha Chini community, south of Mount Kilimanjaro. They traded grains, honey, beer, and tobacco with the pastoral Kisongo Maasai in exchange for livestock, milk, meat, and skins. Demand for Arusha’s foodstuffs increased substantially during the 1860s when the Pangani Valley trade route was extended through Old Moshi, Arusha, and ultimately to western Kenya. Although it was not yet a town, it was a regional center and had a number of urban features.