I made this montage of Dr. Haber when I was in my “wow, the Haber-Bosch process underlies our entire world” phase. Haber’s life is one of the best parables of the dangers and benefits of science and technology. He invented the Haber-Bosch process, which sustains more than 2 billion people and consumes between 1 and 2% of the global energy budget. Without it, cities could not eat.

He also invented Zyklon B, which was used to kill millions of Jews during the Holocaust, and other chemical weapons which were used during WWI. During the war, his wife — who was also a Ph.D chemist — shot herself in the head with his army pistol, after which he promptly went to the Eastern Front in WWI to oversee gas release against the armies of Russia. His son shot himself shortly after WWII. Ironically, Dr. Haber was of Jewish descent.

Overall, Haber was evil. If he hadn’t died in 1934, and was of Jewish background, Adolf Hitler probably would have loved him to be the #1 mad scientist in his global Nazi empire. Hitler’s Hojo, if you will.

Still, the evil that Haber unleashed is little in comparison to what the builder of a human-indifferent recursively self-improving Artificial Intelligence could do, without even meaning to.