The French and Indian War (1754-1763) in North America and the Seven Years' War (1756-1763) in Europe were the first two early attempts at unity by the American colonies.
During the French and Indian War, where the British and the American colonists fought the French and their Indian allies, unity was considered to be mandatory because a French victory in the New World would result in a loss of British superiority. Also, In the Seven Years' War, France and Austria put aside their differences and united against Britain, urging most of the other European powers to their side.
Jews believe that Jesus was just a normal person claiming to be God's son, while the first Christians believed that He truly was the son of God. However, they both believed in the same God. Their religions both originate from Abraham, the first prophet. Jesus was worshiped by Christians, while treated like a heretic and ultimately killed by the Jews.
In west African cultures, only certain classes of people could be slaves, while in the Atlantic slave trade, anyone could be captured and become a slave