On August 5th,1945 the first atomic bomb was dropped on Hiroshima. It produced an explosion releasing an energy equal to 20,000 tons of T.N.T. It killed about 200,000 people. If this bomb had not been used then, the world not have realized to the full the its destructive power. Since then, a hydrogen bomb has been perfected by certain world powers. It is believed that this super-bomb, when exploded, will release energy equal to 100 megatons of T.N.T. The Hiroshima bomb killed only 200,000 people. But if a single hydrogen bomb is used in warfare, it will kill about 1,000,000,000 people. If five such bombs are dropped on the five continents, almost the entire population of the world, estimated at 3,700,000,000 people, will be destroyed. This is the reason why the world does not want another war. If there were another war, the whole world would be destroyed.