Peacebucks were born in the Viet Nam era, and may well have played a part in bringing that chapter in American history to an end. Literally, it was a way to "put your money behind peace."
Peacebucks are what their creator calls "a capital plan for peace." Their philosophy is simple: spend your money where it does good; boycott the bad guys and starve them into oblivion. It's a way to make a statement on money that doesn't deface it.