Anthropology is the study of human life and experience in all its diversity and richness, ranging from small-scale Indigenous peoples to the modern capitalist world system with all its globalising processes. Anthropologists have many different perspectives on the study of human societies and culture, past and present, and they consider a range of interpretive questions, the broadest being Why do people do what they do? Since anthropology employs a broad approach it also draws on other disciplines such as human biology, ecology, linguistics, history, politics and psychology.