Settler colonialism is a form of colonial formation whereby foreign people move into a region. An imperial power oversees the immigration of these settlers who consent, often only temporarily, to government by that authority. This colonization sometimes leads, by a variety of means, to depopulation of the previous inhabitants, and the settlers take over the land left vacant by the previous residents. Unlike other forms of colonialism, the "colonizing authority" (the imperial power) is not always the same nationality as the "colonizing workforce" (the settlers) in cases of settler colonialism. The settlers are, however, generally viewed by the colonizing authority as racially superior to the previous inhabitants, giving their social movements and political demands greater legitimacy than those of colonized peoples in the eyes of the home government.