The book uses case studies, starting with the Crusades and moving through sectarian conflicts within Islam and Christianity, to show how religious ideology has been manipulated. It explains how interpretations of religious texts and actions of religious leaders contribute to violence.
A key argument is that religion, though not inherently violent, has been used as a justification for war, often masking political and economic motives.
The book concludes by exploring ways for interfaith dialogue and conflict resolution, offering strategies to reduce future religious wars.