Do they end without one side dying off, giving up or leaving? Does the appearance of an external threat end the culture war or make it worse by working with on

Do they end without one side dying off, giving up or leaving? Does the appearance of an external threat end the culture war or make it worse by working with one side? Has there been any time in recorded history when such wars weren't occurring? We know more about them now, but that doesn't mean they're more or less frequent. Merely better attended.