Simcha Blass Simcha Blass Simcha Blass (November 27, 1897 – July 18, 1982; ) was a Polish-Israeli engineer and inventor who developed the drip irrigation system with his son Yeshayahu. Simcha Blass was born in Warsaw, Poland, which was then part of the Russian Empire, to an Orthodox Jewish family. He was active in the Jewish self-defense units organized in Warsaw to defend Jews during the end of World War I. His engineering studies in Warsaw were interrupted by the Polish-Soviet War and completed after that war. During the war, he was recruited to the Polish Army, there he invented for the
Religion in the Soviet Union sum, Muslims were not a homogeneous group with a common national identity and heritage, although they shared the same religion and the same country. In the late 1980s, unofficial Muslim congregations, meeting in tea houses and private homes with their own mullahs, greatly outnumbered those in the officially sanctioned mosques. The unofficial mullahs were either self-taught or informally trained by other mullahs. In the late 1980s, unofficial Islam appeared to split into fundamentalist congregations and groups that emphasized Sufism. Soviet policy toward religion was based on the ideology of Marxism-Leninism, which made atheism the official doctrine of the Communist Party.