In an age surely dominated by the machine (and the machine gun) what stands out instead about the era of Muscular Modernity was the rise of the subtly implied threat of old fashioned physical violence, used as a casual instrument of control by parents, teachers, bosses and competitors all through the Westernized world.
But only in one highly westernized part of the Orient, Japan, did this turn into the frequent and casual use of actual hands-on physical violence as a form of social control.