Israeli open public intellectual, polymath, and faculty person in Hebrew School of Jerusalem. He went to the School of Berlin in 1919, where he was students of chemistry and school of thought. He afterwards received his M.D. in the School of Basel in 1934. He was the editor from the Encyclopaedia Hebraica. He wedded Greta Leibowitz, plus they acquired six children jointly. His sister was the renowned Biblical scholar Nechama Leibowitz. He was honored the Israel Award in 1993, which Yitzhak Rabin threatened to boycott due to Leibowitz’s advocacy for Israeli-Palestinian tranquility.