The idea that scientists have to work together in an open-source format existed before the WWII. One of the reasons the open format of science disappeared was the US government and its fear of treason. Leo Szilard who created the first atomic chain reactions and later worked on the Manhattan project was one of the few scientists to oppose the idea of the US government to divide the scientists, and to make the research top secret therefore illegal to discus. His argument was that if the scientists shared their ideas the research would go faster. The movie “The Atomic Café” shows in part the destruction of the open physics research.