This idea of the functionality of polytheism is common to a number of religions who, nevertheless, philosophically will maintain a monistic position.
Religious scholars Benjamin Sommer, Jack Miles, Malika Zeghal, and Wendy Doniger (specializing in Judaism, Christianity, Islam, and Hinduism, respectively) exchange views on the degree to which polytheism has contributed to the development of those religions, with particular focus on the ways in which monotheistic or polytheistic beliefs have affected its past and current tolerance of other religions.
Above: Hindu temple in Saint Andre on Reunion Island. Photograph by Iwan Beijes.