(1500-1800) The moment that european countries started colonies and global trade.
(1800-1950) Global trade increases a lot, because there is more material needed in europe.
(1950-1990) Colonies start to make their own choice and become independent.
(1950-1990) Global trade changes into a capitalism or communism. They start to trade in their oen trading block.
(after 1990) You can buy things from around the world