I believe it was written by Lee Hays of The Weavers fame.

I remember the song was in a collection called The folksingers Songbag. but as I remember it was in the key of F. Its still obtainable apparently.


https://www.sheetmusicwarehouse.co.uk/20th-century-songs-t/the-folk-singers-song-bag-songs-with-words-and-guitar-chords/