Critics love to state that universalism is heretical and a fringe belief totally outside of the scope of the mainstream. But this is actually quite untrue and a viewpoint borne out of some rather tragic ignorance of church history. Actually, most universalistic influences have just been rather secondary and indirect, as attempts have been made to push it out into the sidelines. Some of the greatest influences upon the church and the world have been universalistic in belief while ether they or their beliefs have remained obscure and worked from the background (or else their influence has been largely forgotten)
Excluding the Pauline Christian communities and Paul himself, partially because it’s so hotly debated but also because if Scripture is universalistic then that is a given, we have this partial list:
Origen (considered heretical, but what seems to be unknown is his influence on St. Gregory who was also a universalist)
Many Anabaptists (simple Christian communities which I believe influenced the Moravians and Quakers)
Early Universalist movement in colonial America (which could probably be said to have helped fuel the Revolution and the concept of natural rights)
George MacDonald (C.S. Lewis’s self-admitted greatest inspiration)
Florence Nightengale (I have a vague idea of her influence on the medical community)
Madeleine L’Engle (influential children’s fantasy author)
Charles Schulz (according to Amirault!)
Hannah Hurnard (influential writer whom inspired the name of Jars of Clay’s album Much Afraid)
Any others? I’d love to add them to the list. Would Karl Barth be one?