The cotton gin made cultivation of cotton profitable.
Military supplies such as planes war ships bombs it was the largest industrial expansion in history hope this helps.
1. The Russian were in a civil war against the Soviets. They were to worried about the war against the Soviets.
2. They believed Germany was still a threat and they wanted to make Germany as less of a threat as they could so the did not let Germany participate in the treaty of Versailles.
Earlier Americans felt that Africans were lower than them because they looked different and originated from a different place.
