Most influential persons of the 20th century?

Carl Bosch Fritz Haber Which person had the greater impact in the 20th Century? Hitler, Gandhi, Einstein, etc. According to Nature [1], it is the duo Haber-Brosch because of their invention. Their Haber-Bosch process has often been called the most important invention of the 20th century as it “detonated the population explosion,” driving the world’s ...