Imperialism and imperial rivalry provided both a cause and context for World War I. Imperialism is a system where a powerful nation controls and exploits one or more colonies. Colonies can also be invaluable sources of cheap labour, agricultural land and trading ports.
Adopting the united states constitution would be a problem for the united states
The work of the Underground Railroad resulted in freedom for many men, women, and children. It also helped undermine the institution of slavery, which was finally ended in the United States during the Civil War. Many slaveholders were so angry at the success of the Underground Railroad that they grew to hate the North.
Galileo discovered that the earth revolved around the sun not that the sun revolved around the earth.
