 He also seems to have been a staunch critic of certain Buddhist doctrinal views, mainly Sarvāstivāda (an eternalist theory of time), Pudgalavāda ("personalism") and Lokottaravāda ("transcendentalism").Because of this, he is seen as one of the founders and defenders of the Theravada, which to this day rejects these three doctrines as unorthodox deviations from the original teaching of the Buddha Dhamma.Theravada sources state that with the aid of Moggaliputtatissa, Ashoka was able to purge the Buddhist Sangha of numerous heretics.