War’s violent nature, and controversial social effects, raise troubling moral questions for any thoughtful person. Is war always wrong? Might there be situations when it can be a justified, or even a smart, thing to do? Will war always be part of human experience, or can we do something to make it disappear? Is war an outcome of unchangeable human nature or, rather, of changeable social practice? Is there a fair and sensible way to wage war, or is it all hopeless, barbaric slaughter? When wars end, how should post-war reconstruction proceed, and who should be in charge? What are our rights, and responsibilities, when our own society makes the move to go to war?