That's WTF I'm here??

All human history has one purpose: To repair Salo's spaceship. 

Salo, the Tralfamadorian explorer, is a robot built millennia earlier to carry a message to a distant galaxy. His spacecraft is powered by the Universal Will to Become or UWTB, the "prime mover" which makes matter and organization wish to appear out of nothingness. (UWTB, Vonnegut informs the reader, was responsible for the Universe in the first place and is the greatest imaginable power source). A small component on Salo's spacecraft breaks and strands him here in the Sol System for over 200 millennia. He requests help from Tralfamadore, and his fellow Tralfamadorians respond by manipulating human history so that primitive humans evolve and create a civilization in order to produce the replacement part. Rumfoord's encounter with the chrono-synclastic infundibulum, the following war with Mars and Constant's exile to Titan were manipulated via the Tralfamadorians' control of the UWTB. Stonehenge, the Great Wall of China and the Kremlin are all messages in the Tralfamadorian geometrical language, informing Salo of their progress.

So it goes....