Just read "Johnny Got His Gun" by Dalton Trumbo. Not sure how I missed this earlier. This is an anti-war novel written in 1938. It is about a young soldier returning from WWI trapped in a severely injured body. After struggling to remain sane he finally figures out how to communicate with the outside world. I won't spoil the ending but two themes stuck with me. The Strong (powerful) send the Weak (less powerful) to war much like slaves; and as long as war is profitable, the Strong will send the Weak to fight wars.

This book was popular during the anti-Vietnam war time frame.

We have 2 copies of the 1970 paperback addition available