Neil Howe and William Strauss published the book, The Fourth Turning, in 1997 Fans of the book say it has proved remarkably accurate at predicting events The authors say there is an upheaval every 20 years with generational change Every 80 years there is a 'fourth turning', with dramatic, radical change They argue Civil War, American Revolution and First World War were 'turnings' Believers argue COVID and BLM social unrest are part of this 'turning' Order will be restored by a 'Gray Champion' - part leader, part saint