Yes, it is true that historians believe that the time from prehistory to the development of agriculture spans more than two million years, since it is thought that humans first appeared on Earth roughly six millions years ago.
Corruption, war/conflicts, and foreign interference and humanitarian abuses.
The result was that Dwight Eisenhower became president in 1952.
At the First Continental Congress, delegates were talking about what to do about the Intolerable Acts. They decided they were going to boycott British goods. Britain didn't like this, and sent troops to Lexington and Concord.