History of Christian universalism
In Christian theology, universal reconciliation is the doctrine that all sinful and alienated human souls—because of divine love and mercy—will ultimately be reconciled to God. The doctrine has been rejected by most mainstream Christian churches, which tend to maintain at least the possibility that many are not saved, but it has received support from many prestigious Christian thinkers as well as many groups of Christians. It has been argued that the Bible itself has a variety of verses that seem to support a plurality of views.
Origen, traditionally considered a 3rd-century proponent of Universal Reconciliation
Salvation in Christianity
In Christianity, salvation is the saving of human beings from sin and its consequences—which include death and separation from God—by Christ's death and resurrection, and the justification entailed by this salvation.
A 'Jesus Saves' neon cross sign outside of a Protestant church in New York City