Pioneering cultural historian Johan Huizinga’s short chapter on puerilism, featured in his interwar essay In the Shadow of Tomorrow, famously highlighted what he considered the mutual “contamination of play and seriousness in modern life.” “Puerilism we shall call the attitude of a community whose behaviour is more immature than the state of its intellectual and critical faculties would warrant, which instead of making the boy into the man adapts its conduct to that of the adolescent age” (Huizinga, 1935 [1936, p. 170]). The puerilist condition degrades the serious to the superficial, true and ritual play to boundless childishness. It is a dangerous and decadent symptom, a “bastardization of culture,” a semi-seriousness and appetite for the sensational and the trivial appealing to obedient masses and small minds. Modern man becomes a slave to his comforts. “In his world full of wonders man is like a child in a fairy tale. He can travel through the air, speak to another hemisphere, have a continent delivered in his home by radio. He presses a button and life comes to him. Will such a life give him maturity?”