Star Trek
In 2053, World War III ended on Earth. In 2063 Zefram Cochrane, invented the warp drive, a way to travel faster than the speed of light. Because of this invention, Vulcans came to Earth to meet the humans. This is shown in Star Trek: First Contact. The Vulcans helped humans fight disease and hunger. In 2150 humans created a United Earth Government that combined all the old governments into one.