Benjamin Franklin on Man

Men I find to be a Sort of Beings very badly constructed, as they are generally more easily provok’d than reconcil’d, more dispos’d to do Mischief to each other than to make Reparation, much more easily deceiv’d than undeceiv’d, and having more Pride & even Pleasure in killing than in begetting one another, for without a Blush they assemble in great Armies at Noon Day to destroy, and when they have kill’d as many as they can, they exaggerate the Number to augment the fancied Glory; but they creep into Corners or cover themselves with the Darkness of Night, when they mean to beget, as being asham’d of a virtuous Action.

from a letter written in Passy, 1782 (quoted by Steven Johnson, "The Invention of Air")