“It occurred to me that if I could invent a machine - a gun - which could by its rapidity of fire, enable one man to do as much battle duty as a hundred, that it would, to a large extent supersede the necessity of large armies, and consequently, exposure to battle and disease [would] be greatly diminished.” ― Richard Jordan Gatling, 1877

Should write a MIT case study on that in "Bad Hypotheses 101"