A major one which no one can overlook is technological and based on inventions and discoveries which have altered the whole basis of production and deeply affected social relations.
“The father of a daughter is nothing but a high-class hostage. A father turns a stony face to his sons, berates them, shakes his antlers, paws the ground, snorts, runs them off into the underbrush, but when his daughter puts her arm over his shoulder and says, 'Daddy, I need to ask you something,' he”