Why did government funding become important for large-scale scientific research during World War II?

During World War II, government funding became essential for large-scale scientific research because the costs of modern, complex projects—such as the Manhattan Project—far exceeded the capacity of private industry or traditional philanthropic sources.12

Under the leadership of Vannevar Bush, who chaired the Office of Scientific Research and Development (OSRD), the United States government began directing the marriage of public funding and scientific inquiry to meet urgent national security needs. This shift transformed scientific research into a national security priority, enabling the development of critical technologies like radar and the atomic bomb.132

By shifting these exorbitant costs from industry to the state, the government made previously impractical "Big Science" experiments feasible. This mobilization of the intellectual community not only accelerated wartime innovation but also established a permanent system of government-sponsored research that fundamentally reshaped the role of scientists and the nature of scientific inquiry in the postwar era.132