Secular Religions: The Key Concepts provides a concise guide to those ideologies, worldviews, and social, political, economic, and cultural phenomena that are most often described as the modern counterparts of traditional religions. Although there are many other terms in use (quasi, pseudo, ersatz, political, civil, etc.), it is “secular religion” that best expresses the problematic nature of all such descriptions which maintain that modern belief systems and practices are secular on the one hand and religious on the other. Today, the topic is as popular as ever, and secular religions are discovered far and wide. Hence, a critical summary is urgently necessary. The juxtaposed title is itself an expression of ironic distance. The book emphasizes inherent tensions of relevant literature in a critical and informative fashion. The author provides over 100 entries, from abortion to wokeness, as well as a detailed introduction, which gives an overview of the different definitions of “religion” and “secular religion” as well as the history of secular–religious comparisons. The main text reconstructs the argument of several key works on each given topic, while lists of sources for further reading are provided at the end of each entry. This book provides a clear introduction to “secular religions” and will appeal to researchers and students of religious studies, political philosophy, political theology, the history of ideologies, and cultural studies.