What is the name of the science that studies how different peoples lived, what events took place in their lives

What is the name of the science that studies how different peoples lived, what events took place in their lives, how and why did it change and become the same as it is now?

This is history. The science that studies individual peoples is called ethnography. But the science that studies the events that took place among these peoples is already history. It is she who deals with the consideration and research of such events, as well as the cause-and-effect relationship between them. There are cases in history when separate peoples existed, and then they disappeared or assimilated with alien tribes. These peoples include the ancient Sumerians, who at the end of the 3rd millennium BC assimilated with the Amorites and other tribes of Mesopotamia.