Isidor Isaac Rabi, an American physicist of Polish-Jewish origin, winner of the Nobel Prize in Physics for the resonance method of observing the magnetic properties of atomic nuclei. He was also a co-creator of the American atomic bomb, and at the same time an ardent champion of peace.

Isidor was born in Austro-Hungarian Galicia, in what is now Poland. In 1899, his father emigrated to the United States. Isidor entered school, but at the age of four he and his mother left for the USA, where he joined his father and settled in New York. He graduated in chemistry from Cornell University and then in physics from Columbia University, where in 1929 he obtained a doctorate. His thesis was about the magnetic properties of crystals. During a two-year trip around Europe, he became acquainted with the achievements of the most eminent scientists of the “old continent” of that time. After returning to the US, he taught theoretical physics at Columbia. There, in 1937, he became a professor of physics.
In 1940–1945 he headed a group of scientists working at the Massachusetts Institute of Technology on the construction of radar. The physicist believed that his research would contribute to a faster end to the war and the defeat of Germany. He worked with conviction and under the depressing impression of the Holocaust taking place in Europe, in which his relatives also died.

My mother made me a scientist without ever intending to. Every other Jewish mother in Brooklyn would ask her child after school: So? Did you learn anything today? But not my mother: “Izzy,” she was saying, “did you ask good questions today?” That difference — asking good questions — made me become a scientist.

In 1940–1945 he headed a group of scientists working at the Massachusetts Institute of Technology on the construction of radar. The physicist believed that his research would contribute to a faster end to the war and the defeat of Germany. He worked with conviction and under the depressing impression of the Holocaust taking place in Europe, in which his relatives also died.
In the years 1946–1956 he was a member of the American nuclear energy commission, and after the resignation of Robert Oppenheimer in 1952, he became its chairman. Isidore Rabi quickly realized that the development of weapons of mass destruction could endanger the world. That is why he became involved in efforts to stop the arms race and the peaceful use of the nuclear power plant. Together with another Nobel Prize-winning physicist and participant in the nuclear program, Enrico Fermim demanded an international conference that would ban further work and production of the hydrogen bomb.
After many years Izydor Izaak Rabi visited his family Rymanow. In the town chronicle there is his handwritten entry dated July 5, 1971: “I am writing this during my stay in Rymanów Zdrój after 73 years of absence. As expected, the place is beautiful. My parents told me about the tragic history of this tiny city. My wife and I thank the mayor and his wife for the wonderful welcome. “

Isidor Isaac Rabi was the initiator of the creation of the international CERN laboratory in Geneva and the Brookhaven National Laboratory near New York. His most important scientific achievement was the development of a method for measuring the magnetic properties of atomic nuclei, for which he was awarded the Nobel Prize in Physics in 1944. He was supported by Albert Einstein himself.