His religious ideology was linked to a theory that the Last Days would see a power struggle between the "Orient" and the "Occident", a view that helped to fuel the Yellow Peril panic.

These continued to function for a few years after his death led by his close associate John S. Stanford and Rupert's own son and daughter.

[2] Adapting the Adventist view of Seven church eras, Rupert argued that the "Philadelphia" phase was the period in which William Miller worked (from 1833 to 1844).

[2] Rupert's theories were later influential on Herbert W. Armstrong, who adopted many of his ideas about church eras and Jewish holy day observance, along with his British Israelist genealogies of western peoples.

In the third edition, published after the Russian Revolution, Rupert identified the rise of Bolshevism and the expansion of communism as the beginning of a process that would lead to the fulfilment of his predictions.