The Watch Tower Bible and Tract Society and its precursor organization, Zion's Watch Tower Tract Society, considers the Great Apostasy to have properly begun before the death of the last Apostle, along with the warning signs and precursors starting shortly after Jesus' ascension. Jehovah's Witnesses consider adoption of the Trinity – which they allege is based on a specious application of Greek Platonic and sophistical philosophy and is a violation of the Scriptural precepts set forth beginning in the Law of Moses – as a prime indicator of apostasy. Jehovah's Witnesses consider that the falling away from faithfulness was already complete before the Council of Nicaea, when the Nicene Creed was adopted, which then enshrined the Trinity doctrine as the central tenet of nominal "Christian" orthodoxy.