With Alexander the Great’s conquest of much of the known world in the third century B.C. there was a danger that Jewish families would accept Greek pagan religious customs. This gave rise to Jewish religious leaders called Pharisees that sought to impose not only Mosaic Law, but added many additional rules and restrictions. Greek language, however, became popular and many Jewish families were bilingual. The widespread usage of the Greek language would benefit the spread of Christianity during the life and following the death of Jesus.