What did wilbur zelinsky's model of migration predict?

Wilbur Zelinsky's most previous job was a geography professor at Pennsylvania State University. Zelinsky's model proved five different phases for different types of society, shown here: (1) Premodern traditional society: very little migration (2) Early transitional society: high rate of migration from rural areas to cities (3) Late transitional society: urban to urban migration (4) Advanced society: urban to suburban migration (5) Future super advanced society: interurban migration.

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.