One of the main reasons Hoover lost the election of 1932 was because the United States economy was in shambles due to the Great Depression, and Hoover was unwilling to do much about it from a governmental standpoint.
The invention was the alternating current made by Nikola Tesla.
Explanation:
The 1898 Treaty of Paris ending the war gave Cuba its independence and also ceded important Spanish possessions to the United States—notably Puerto Rico, the Philippines, and the small island of Guam. ... The United States was suddenly a colonial power with overseas dependencies. So it became a world power after the industrial revolution.
The purpose of dividing the government into 3 different branches was that so one entity did not have all the power. So they basically did it to divide the power.