Transmitting an understanding of warfare from World War I to the present, WHY NATIONS GO TO WAR, a unique book and a product of reflection by author, John G. Stoessinger, is built around ten case studies, culminating in the new wars that ushered in the twenty-first century: Iraq, Afghanistan, and the wars between Arabs and Israelis in Gaza and in Lebanon. The distinguishing feature of the book remains the author's emphasis on the pivotal role of the personalities of leaders who take their nations, or their following, across the threshold into war.