Of all the human sciences, anthropology is the broadest. Anthropologists study how human beings have come to be as they are: a physically distinct species, communicating through language, adapted to every habitat on earth, and living in an amazing variety of lifeways. As anthropologists become increasingly engaged with the world, they have led in the development of a global focus on how culturally different peoples interact, how humans change their customary ways of life, and how they have evolved over time. The BA degree is designed to give students a well-rounded background in the four subfields of anthropology (biological, cultural, archaeological, and linguistic anthropology).