One World or None (1946) is an instructional documentary short film produced by the National Committee on Atomic Information in conjunction with Philip Ragan Productions. Made just months after the Atomic bombings of Hiroshima and Nagasaki, it is considered the first postwar "atomic scare" film. Synopsis One World or None established that throughout history, scientists from many nations have made great advances and discoveries and have shared that knowledge globally. The periodic table was developed by Russian chemist Dmitri Mendeleev, British scientist J. J. Thomson and his team discovered the principle of the electron, and German theorist Albert Einstein came up with the theory of relativity. Nuclear physics was a product of New Zealand physicist Ernest Rutherford's work on the atomic nucleus, Danish physicist Niels Bohr's identification of atomic structure and American physicist Carl David Anderson's discovery of the positron. Other advances included English physicist James Chadwick discovering the neutron, while French scientists Irène Joliot-Curie and her husband Frédéric Joliot-Curie studied artificial radioactivity. Further nuclear research was carried out by Enrico Fermi, who transmuted uranium based on Japanese physicist Hantaro Nagaoka's theories on the atom. German scientist Otto Hahn derived barium from uranium, while uranium was split by Austrian-Swedish physicist Lise Meitner. Knowledge about atomic energy was shared by all. The question remains, will the people of the earth use this powerful energy to benefit humanity? The first outward manifestation is the atom bomb that was dropped on Hiroshima. Images of the city after the attack are startling. Imagining the destruction inflicted in seconds on an American city. A metropolis such as New York City, Chicago or San Francisco would have its downtown core devastated by blast effects and radioactivity. According to information provided by the Federation of American Scientists, the massive destructive power of the atom bomb is contrasted with earlier weapons of war. A Roman soldier's lance would only kill one enemy, Napoleon's cannon perhaps a dozen, the "Big Bertha" cannon could kill up to 88, and the V-2 killed as many of 168 individuals on average, but the first atom bomb killed more than 100,000 at Hiroshima. The atom bomb was delivered by aircraft which had a limited range, but new bombers have an intercontinental range. Imagine the frightening prospect if Japan and Germany had had the atom bomb during the war. Attacks by the Axis powers could have brought World War II to an end, as