Complex sentence: This was a radically different view than the not-self view held by the mainstream Buddhist schools and this theory was a major point of controversy and was thoroughly attacked by other Buddhist schools such as the Theravadins, Sarvastivadins and later Mahayanists.
Split into simpler sentences: This was a radically different view than the not-self view held by the mainstream Buddhist schools. This theory was a major point of controversy and was thoroughly attacked by other Buddhist schools such as the Theravadins, Sarvastivadins and later Mahayanists.