The Fourth Turning by William Strauss and Neil Howe (pg. 82)

A key consequence of these cross-cycle shadow relationships is a recurring pattern that lies at the heart of the saeculum: an oscillation between the overprotection and underprotection of children. During a Crisis, Nomad-led families overprotect Artist children; during an Awakening, Artist-led families underprotect Nomad children. Following a Crisis, Hero-led families expand the freedoms of Prophet children; following an Awakening, Prophet-led families curtail the freedoms of Hero children.