Toynbee developed his concept of an "internal proletariat" and an "external proletariat" to describe quite different opposition groups within and outside the frontiers of a civilization. These groups, however, find themselves bound to the fate of the civilization. During its decline and disintegration, they are increasingly disenfranchised or alienated, and thus lose their immediate sense of loyalty or of obligation. Nonetheless an "internal proletariat" may form a "universal church" which survives the civilization's demise, co-opting the useful structures of the earlier time while creating a new philosophical or religious pattern for the next stage of history.
Before the process of decay, the dominant minority had held the internal proletariat in subjugation within the confines of the civilization, causing these oppressed to grow bitter. The external proletariat, living outside the civilization in poverty and chaos, grows envious. Then, in the social stress resulting from the failure of the civilization, the bitterness and envy increase markedly.
Toynbee argues that as civilizations decay, there is a "schism" within the society. In this environment of discord, people resort to archaism (idealization of the past), futurism (idealization of the future), detachment (removal of oneself from the realities of a decaying world), and transcendence (meeting the challenges of the decaying civilization with new insight, e.g., by following a new religion). From among members of an "internal proletariat" who transcend the social decay a "church" may arise. Such an association would contain new and stronger spiritual insights, around which a subsequent civilization may begin to form. Toynbee here uses the word "church" in a general sense, e.g., to refer to a collective spiritual bond found in common worship, or the unity found in an agreed social order.