This is a definitive historical study of celibacy in the Roman Catholic church. This book not only shows that celibacy was not a Roman Catholic clerical requirement until 1139 (and before that most high-ranking officials were married), but it also documents the ways in which this issue pulled apart the Church, from to the 1054 Schism, to the horrors of the Crusades, to even the Protestant Reformation. Phipps clearly shows that celibacy was not a feature of Jewish tradition (in fact, it goes against Hebrew scriptures), nor was it practiced by Jesus's disciples (and maybe not even Jesus himself!). Rather, the roots of celibacy come from Greek and Roman pagan traditions—from their strains of asceticism, stoicism, and, frankly, misogyny. The deep distrust of humanity and sexual desire—sometimes even within> the bounds of marriage—was amplified and distorted to criminal proportions, leading to nearly a thousand years of crisis. While there is some repetition of ideas throughout the book, this serves to make each chapter readable on its own for those unable to read through the entire work.