The Scottish philosopher Adam Smith held the view that businesses should regulate themselves without government oversight via a concept he called "invisible hand". He was one of the first to create the idea of the free-market economic theory, where people working under its own self-interest, a division of labor and competition contribute to economic prosperity. A system of perfect liberty, without government intervention, would create an orderly society. This concept contributed to the creation of the Austrian school, and the development of the classic liberalism with economists such F. A. Hayek, Ludwig Von Mises and Milton Friedman.
The right answer is the development of the atomic bomb.
The full-scale development of a Nuclear bomb came after the Japanese attack in Pearl Harbor, and knowing Germany was leading nuclear uranium research. The project Manhattan was created. The project joined the most renowned scientist of the century with industry, military and thousands of ordinary Americans working at localities across the country to interpret original scientific discoveries into an entirely new kind of weapon, the Atomic Bomb. At its peak, the project employed 130,000 workers and, by the end of the war, had spent $2.2 billion.