The author explores the nature of war, and how it has changed as a result of globalization. He uses the Clausewitzian model of war's trinity (political guidance, chance, and enmity) as a framework for understanding the nature of war, a concept that has been only vaguely represented in defense literature. He then analyses the global war on terrorism via that framework. He concludes that the Clausewitzian trinity is alive and well. Globalization is strengthening the role that political guidance is playing in war, it may well increase the elements of chance and uncertainty, and it is clearly exacerbating basic feelings of enmity among different cultures. It is this last area that the author sees as the most critical in the war on terrorism. If there is a center of gravity in this conflict, it is in the ideas that have fueled radical Islam.