Well, once the Americas were discovered and the colonist found that the soil was agreeable to grow different crops such as tobacco and cotton the colonists realized that they needed people to pick the crops. Originally indentured servants did the hard labor but then when they found that they could get labor by trading goods with African tribal leaders they resorted to importing Africans to the Americas as labor. The tribes in Africa were constantly fighting and whichever side won the losers became the slaves of the winning tribe. However, as Europeans brought valuable things to the continent of Africa such as weapons, salt, gold, and other things the leaders of the winning tribe would give their slaves to the Europeans. There were cases when Blacks captured other Blacks in Africa for the sole purpose of giving them to the European traders. Hopefully this helps. If you haven't see the movie La Amistad, it will explain in more detail what I have written. I learned a lot from that movie. I must warn you the first 5 to 10 minutes are a bit gory. I had a hard time watching that part.
Not only goods but also culture was "traded" along trade routes. The Renaissance was a time period of new thinking. Trade influenced the renaissance because it gave Europeans a contact with other cultures that had perhaps developed newer or better techniques and technologies. For example, the Arabic states had advanced universities and had made great discoveries in mathematics.
Well, in the first World War, Germany lost the war because of the Jewish. Another reason would be that Hitler used myths and lies, and used anti-semitism to his advantage, with myths like how the Jews killed Jesus Christ(when it was actually the Romans) So because of religious prejudice and a long history of anti-semitism made them prime targets.
They built a better currency trade so people could buy what they want without plying redicious amounts of money. the bisnusses were not making enough money, the great depression started arround 1929 so the great depression would be a cause of there spending habbits.
