Reasons are-
1. conflicts over boundaries of the state.
2.the issue of slavery. the north people did not want to create another state of slavery.
3.bcoz many groups were against it.
4. the us state towards theslave states.
5. fear that it would lead to war.
i just know this.... hope this helps u...
Gold sugar silver cotton is the main commodity
Before Einstein, it was believed that science was just all about compact summaries and experience during research. When Einstein arrives on the scene, his theory of relativity was able to open new paths towards complicated mathematical equations that other scientists didn't know about. This opened up tons of opportunities that shaped up science and how we calculate various mathematical problems that can be used in various aspects of the world.
Many countries wanted to control over many economic activities in other countries as well as utilize other countries for cheap labor. In addition, some countries wanted to explore the world and conquer for their homeland while other countries thought that their own country and race was superior to all other countries and therefore believed it was needed that they invade other countries and educate them as well as some countries practicing imperialism to convert people to their religion.