Across the multiple fronts of ideational battle, from the speeches of presidents to books of social and cultural theory, conceptions of human nature that in the post-World War II era had been thick with context, social circumstance, institutions, and history gave way to conceptions of human nature that stressed choice, agency, performance, and desire. Strong metaphors of society were supplanted by weaker ones. Imagined collectives shrank; notions of structure and power thinned out. Viewed by its acts of mind, the last quarter of the century was an era of disaggregation, a great age of fracture.
Daniel T. Rogers, Age of Fracture, 3.