This work investigates the relationship between the rapid growth of urban environments and the corresponding shift toward secularization in modern society. Harvey Cox, a professor of divinity at Harvard University, utilizes a theological framework to argue that secularization is not a rejection of faith, but rather a necessary emancipation of human responsibility within the modern urban context. He posits that the city serves as the primary arena for human maturity and the realization of social ethics.

Scholars and theologians frequently identify this text as a foundational document for understanding 20th-century religious discourse. Readers often note the academic density of the prose, which requires a basic familiarity with theological terminology to fully grasp the author's arguments.