Minor (possibly regional) lyric variations: we sang

A plea for one world is heard in many different lands.
This is the plea of a world that is hungry for peace.
Let all men come together.
Let us work well together,
Striving to make our world better,
Pledging our lives to peace.

As an interesting (to me) sidebar, this song was for a time in the 60s banned at our local Girl Scout camps (Oklahoma and Texas; don't know if this was more widespread). I was told by a college-age counselor this was because the idea of everyone working together was Communistic. Go figure.
Of course certain banned songs, including this one, were not heard around the "official" campfires but got a good deal of airtime in our tents or cabins after lights-out.