A while back I ran across General Smedley Butler, a decorated US Marine General during WW I who almost became the fascist dictator of the US (The Business Plot).  Instead Butler wrote a slim 33 page booklet called “War is a Racket“.  I just read it and you should too.  It’s available from Google Books for $2 and from several other sources.  I did not find a free copy at Project Gutenberg, but there is a readable copy (HTML) at a Canadian version of Project Gutenberg.

War is a Racket