Otto Hahn was a renowned German radiochemist who won the Nobel Prize for his discovery of nuclear fission after a lifetime of working with radioactive isotopes. Nuclear fission is widely regarded as the key invention that enabled the atomic bomb, although Hahn was not involved with its development directly. He is considered to be one of the most famous chemists of all time and the "father of nuclear chemistry." He also was revered by many as a model scientist with an outstanding history of academic achievement, excellent working methods, and a strong record of personal integrity. In his lifetime, he was recognized by many scientists as one of the primary discoverers in chemistry and physics, and specifically, physics accomplished through chemistry. He was the founder and President of the Max Planck Society, an esteemed non-profit worldwide scientific foundation, and the last President of the Kaiser Wilhelm Society, its predecessor organization. In his later years, he was a vocal critic of nuclear weapons and sought to have them banned. He was admired by many Germans as a model citizen, especially in the period following World War II, and he was the recipient of many scientific and civilian awards internationally. To know more about his life and works read on.