All I really know about Karl Marx is that he didn't like capitalism. So I would have to say the invention of capitalism.
It is the Tea Act that was issued to raise money for the British east India company
People begin to migrate out of Africa possibly about.... 2 million years ago.
they would use that because that could give infomation that could be helpful
Well, if we are going to be entirely correct, Christopher Columbus never discovered America, but rather the Vikings did and he landed in Cuba, not mainland America. Anywho, he landed in 1492 with his three ships, the Nina, the Pinta, and the Santa Maria.
