“Thou shalt not kill,” one of the Ten Commandments, is a door leading into a wealth of Biblical wisdom that could help Americans answer moral questions about the endless wars of our time. That door has been blocked, however, by the widespread idea that this commandment applies only to murder and not to war. S.G. Dargan’s book breaks through that barrier with penetrating analysis to show that not only this commandment, but the Christian gospel itself, has much to say about war. A coherent ethical vision is essential for finding realistic answers to troubling questions about America’s wars. Ethical precepts capable of commanding widespread assent will make possible some workable resolutions to our divisive debates over war. Yet, many of the current books dealing with war focus relatively little attention on finding an ethical basis. Here, the Bible can be a helpful resource. This is obviously true for Christians. It is also true for non-Christians, for two reasons. First, Biblical ethics have considerable overlap with the ethical visions of other religions and philosophies. Helping the helpless, for example, is a widely respected precept. Secondly, American culture still contains substantial residues from a more conventionally Christian past. Biblical concepts of justice, then, can provide the basis for constructive discussions about our wars, with the potential for finding consensus solutions. This short book, starting from the Sixth Commandment, takes the reader, by careful steps, into a deeper and more useful Christian understanding of war.