It’s curious that Keynes describes WWI as Europe’s Civil War as seen from London POV. I read one of the key drivers for the formation of a EU was to avoid future wars, but I guess a civil war is always something possible.
Europe has always been a stage for centuries of savage, vicious warfare. This culminated in WW2 after which they called off the game, realizing that the next war could wipe them out.
That, and being caught between the superpowers of the post war era.