Final answer:
Times of change from one role or stage to the next are referred to as developmental milestones, significant in cultural evolution and marked by rites of passage as societies transition through various stages.
Step-by-step explanation:
Times of change from one role or stage to the next are referred to as developmental milestones. These milestones signal significant points of transition in human life and socialization, reflecting changes in individuals' abilities or roles within their society. For example, the transition from the Early Urban Society to the modern Exponential Society represents a crucial watershed in cultural evolution, signifying a shift in ecological phases of human existence.
Demographic transition theory further illustrates how societies evolve along a predictable continuum through various stages from unindustrialized to post-industrial states. In anthropology, rites of passage are used to mark such social transformations, encompassing stages like separation, transition, and incorporation. The idea that demographic transition is a part of cultural development shows a blend of continuity and discontinuity in how these changes occur.