Original sentence: That said, the vast majority of theologians, within several hundred years after the Council of Nicaea, affirm that the doctrine of the Trinity is a central tenet of the Christian faith.Today, most mainstream Christian denominations are Trinitarian
Edited sentence: That said, the vast majority of theologians, both ancient and modern, affirm that the doctrine of the Trinity has traditionally been a central tenet of the Christian faith.Today, all mainstream Christian denominations are Trinitarian