With what two other religions does christianity share it's early history?

Judaism and Mosaic. The Jew's had followed the laws of Moses though many of the scribes and Pharisees had added to the law or bent the laws to their own will.  The apostle Paul had taken charge in spreading the word of God after Jesus' death to the farther parts of the lands and across the sea to Rome. Later on Christianity was warped by Roman pagan practitioners and adopted as the new Christianity which was later called Roman Catholicism supporting gods of love, luck, war and fertility into holidays they claimed to be christian observances.