Fritz Haber, a German chemist, revolutionized agriculture with the Haber-Bosch process. He made it possible to mass-produse ammonia for fertilizers, saving billions from starvation. However, his contributions to chemical warfare during World War I, including the development of chlorine gas, led to immense suffering and death. This double legacy is an ethical complexity that scientific innovation presents. While his agricultural advancements supported global food security, his involvement in war and the later use of his inventions for genocidal purposes, such as Zyklon B, raise critical questions about the responsibility of scientists in shaping the moral impact of their discoveries.