Answer:
The Stone Age was a broad prehistoric period during which stone was widely used to make tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years,[1] and ended between 4,000 BCE and 2,000 BCE,[citation needed] with the advent of metalworking.
Explanation:
becuase it was the slaves because there were alot of people needed more people
Indus Valley, Ancient Egypt, Yellow River Civ, and Central Europe I think.
if I'm not wrong, it is executive power
