Claim: Marcion of Sinope developed the ditheistic system of belief (the notion of two gods) in 144, and he entirely opposed the Tanakh.
Evidence: Marcion responded by developing a ditheistic system of belief around the year 144. In contrast to other leaders of the nascent Christian Church, however, Marcion declared that Christianity was in complete discontinuity with Judaism and entirely opposed to the Tanakh. This notion of two gods—a higher transcendent one and a lower world creator and ruler—allowed Marcion to reconcile his perceived contradictions between Christian Old Covenant theology and the Gospel message proclaimed by the New Testament.