text: The Big Bang theory, like many technical and scientific advances, was something whose time had come. 
  
  https://en.wikipedia.org/wiki/Vesto_Slipher
  
  https://en.wikipedia.org/wiki/Carl_Wilhelm_Wirtz
  
  https://en.wikipedia.org/wiki/Edwin_Hubble
  
  https://en.wikipedia.org/wiki/Alexander_Friedmann
  
  Einstein's General Relativity does not support a static universe. Lemaitre followed up on that, after others did.