The study of mankind (人類) is known as anthropology.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
Koichi's father's specialty is cultural anthropology.
In order to get along with the African ethnic group that she wants to research, she started interacting with the villagers naked.
I wonder why your sister wanted to take an anthropology course.