1) Christian term 
Christian primitivism, also described as restorationism, is the belief that Christianity should be restored along the lines of what is known about the apostolic early church, which restorationists see as the search for a more pure and more ancient form of the religion.{Rp|635}{Rp|217} Fundamentally, `this vision seeks to correct faults or deficie....
• (n.) The belief or doctrines of the Restorationists.
Res`to·ra'tion·ism noun The belief or doctrines of the Restorationists.