In Milios, religion is worldwide, yet limited, consisting of four mainstream beliefs that differ in cosmology, values, practices, and general expectations. These religious beliefs are The Order of the Quartet, Aeosism, Galdanam, Divitrism, and Ounism.
While humankind does generally tend toward congregating based on in-group/out-group dynamics leading to a general majority religion in each nation, each individual's beliefs are independent of their species, native language, geographic location, lifespan, and trade. Believers of every religion are spread across generational, cultural, and national boundaries. Therefore, the people of Milios experience social, cultural, and economic benefits, conflicts, and biases due to their religious beliefs.