Universalism as an ideal is as old as nay, is probably much more ancient than the Christian ideal.
I am doing a lot of work for my church, taking an evangelism class, doing a lot of reading - mostly the Bible and things that coordinate with the Bible and go with the evangelism class.
Today, we have two Vietnams, side by side, North and South, exchanging and working. We may not agree with all that North Vietnam is doing, but they are living in peace. I would look for a better human rights record for North Vietnam, but they are living side by side.

