They usually traded these for slaves which were captured and sold to them.
Galileo's heliocentric theory caused great controversy during the scientific revolution because it challenged what the church said was true and it challenged the writings of past astronomers
The Code of Hammurabi is a well-preserved Babylonian law code of ancient Mesopotamia ,The Prologue of the Code of Hammurabi (the first 305 inscribed squares on the stele) is on such a tablet
John C Calhoun is two time Vice President who supported the slaves and the rights and also he brought the American and he was the big supporter of a limit government