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Bringing just war doctrine to life, Richard J. Regan raises a host of difficult questions about the evils of war, asking first and foremost whether war is ever justified, and, if so, for what purposes? Regan considers the basic principles of just war theory and applies those principles to historical and ongoing conflicts through case studies and discussion questions. His well-received 1996 work is updated with the addition of case studies on Iraq, Afghanistan, Libya, and Islamist terrorist organizations. Especially timely are the added discussions of the use of drones to assassinate terrorist leaders and, in the matter of weapons of mass destruction, asking how certain is "certain enough" that a country has weapons of mass destruction before it can be justly attacked? Regan considers the roles of the president, Congress, and the U.N. Security Council in determining when long-term U.S. military involvement is justified.

The Supreme Court’s decisions concerning the first amendment are hotly debated, and the controversy shows no signs of abating as additional cases come before the court. Adding much-needed historical and philosophical background to the discussion, Richard J. Regan reconsiders some of the most important Supreme Court cases regarding the establishment clause and the free exercise of religion.