MAN BOOB.

John Hawkins breaks it down: Men enjoyed recreational fistfights and gunplay for centuries but, around the time Raiders of the Lost Ark came out, for some unspecified reason they stopped and, no longer being able to relate to action movies, became emasculated.

A few generations before that, women started getting educations and jobs, which was either a retroactive secondary cause of this emasculation or just made it worse. In any case you'll all be sorry.

Conclusion: Civilization is for pussies.

(We have ought to rewrite the old saw for this crew: First time as farce, second and every subsequent time as farce.)

UPDATE. Guess we'll have to quote some Hawkins, because commenters have referred to it. Brace yourselves:

Some of us take martial arts classes or go to the firing range, which is fine as far as it goes, but it’s often like practicing for a game you’ll never play. Chances are, you’ll probably go your whole life without shooting anyone or having to defend yourself from a thug trying to beat you to death on the street.

Substance McGravitas: "OMG I have gone my whole life without shooting anyone! I need a hug. WAIT NO, I need to shoot someone." Michael Søndberg Olson: "Yeah, Hawkins really enjoyed gouging my eye out, and then I made a drive-by of his shack and killed his daughter-wife. And now we're tit-deep in spraying cocks!"