Genocide, Self-Imposed

According to William Manchester's book, "The Last Lion", nearly half of French males, age 20 to 32, were either killed or maimed during WW1. Please, if anyone out there has a statistic which more accurately underscores the insanity of war more than this one, send it, 'cause I'd really like to see it.........................................................................................P.S. Manchester also cites the fact that the British suffered 60,000 casualties on the first day of the Battle of Somme alone and that this sacrifice didn't secure as much as a single yard of territory......and, so, yes, feel free to add, futility, to the criticism, too.