It was in around 1800 B.C. when the Judaism came into existence by Abraham who actually had faith in one single god and denied praying for the idols which were on high in that era. It was in the 1943 B.C.E. when God had sent Abram as a messenger. The God had said that he will allot this prior land to the offspring when Abram migrated to the Canaan land from the metropolis of Ur of the Chaldeans in the Sumeria, 4000 years back. Judaism started with the Moses who incurred Ten Commandments from the God over the Mt. Sinai in 1500 B.C.