His family was very poor, and very religious. Kaplan was a student at the “Mir”, the most famous Talmudic school at that time. In 1912,
he settled in Warsaw and founded a Hebraic primary school. He advocated the teaching
of Hebrew as a living language and published papers in various different Jewish magazines. He kept his journal from 1933 to 4 August 1942. Emmanuel Ringelblum suggested him a shelter for his diary in the underground archives.
He did this at the end of 1942, taking it out of the Ghetto. Chaïm A. Kaplan and his wife were deported to Treblinka in January 1943.
