In ’The Evolution of the Idea of God: An Inquiry Into the Origins of Religions, ’ Grant Allen explores the transformative progression of humanity’s conception of the divine, deftly weaving together historical, philosophical, and anthropological insights. Allen’s literary style is characterized by its engaging narrative and analytical rigor, demonstrating a mastery of both scientific thought and theological discourse. He embarks on a critical and interdisciplinary journey, examining the interplay between religion and the natural world, thereby situating his work within the broader intellectual movements of the late 19th century, particularly the embrace of Darwinian evolution and emerging secular humanism. Grant Allen, a prominent figure in the development of evolutionary thought, was no stranger to controversial ideas. His diverse background as a biologist, writer, and advocate for social reform informed his critical stance on traditional religious narratives. Born into a time of great scientific and ideological upheaval, Allen’s inquiry into the origins of religions reflects his commitment to understanding the foundations of belief systems and their evolution alongside human society. This book is highly recommended for readers interested in the intersections of science, religion, and philosophy. Allen’s compelling analysis invites thoughtful reflection on not only the nature of divinity but also the historical contexts that shaped our understandings of faith. For scholars, students, and the curious alike, this work provides a profound exploration of the roots of religious thought, making it an essential addition to the discourse on spirituality and its place in human evolution.