A friend with deep connections in China recommended Graham Allison's Destined for War after President Xi Jinping warned President Trump that the United States and China were falling into the "Thucydides Trap." Xi spoke confidently about a Greek historian who died twenty-four centuries ago. Trump appeared unfamiliar with both the history and the warning. Watching him respond to Xi, Trump seemed to be willing to dive into the Thucydides Trap rather than just fall into it. That exchange vividly displayed that ideas born in ancient Athens still shape the diplomacy of the twenty-first century.
Destined for War asks a question that has haunted statesmen for nearly 2,500 years: What happens when a rising power challenges an established one? Drawing on the insight of the Greek historian Thucydides, Allison argues that such moments create enormous structural pressures that can make war more likely—not inevitable, but dangerously plausible. His book is both a work of history and a warning directed at the relationship between the United States and China. If you follow the link above you will see Allison's Thucydides Trap project at Harvard.
The concept at the heart of the book is the "Thucydides Trap," named for Thucydides' explanation of the Peloponnesian War. Writing about the conflict between Athens and Sparta, he observed that it was "the rise of Athens and the fear that this instilled in Sparta that made war inevitable." Allison examines sixteen historical cases in which a rising power confronted an established one, showing that many ended in war while others escaped it through exceptional diplomacy, restraint, or luck.
I read The History of the Peloponnesian War in translation and studied portions of it in the original Greek. I found Allison's treatment of Thucydides both thorough and engaging. He avoids reducing the ancient historian to a slogan. Instead, he demonstrates how Thucydides analyzed fear, honor, ambition, miscalculation, and political leadership—forces that remain as relevant today as they were in the fifth century B.C.
When Destined for War was published in 2017, the United States still largely understood itself as the defender of the liberal international order. Allison's analysis therefore assumed a strategic competition between an established democratic superpower and an increasingly powerful authoritarian China. Reading the book today, however, reminds me how much the world has changed. The international landscape has shifted, and so has American politics. The structural rivalry Allison describes remains, but the political assumptions underlying his analysis are very different than when the book was published. Trump admires dictators and undermines democracy at home and in foreign policy.
The book's greatest strength is its insistence that history is not destiny. The Thucydides Trap is a warning, not a prophecy. Structural pressures matter, but leaders still make choices. Misjudgment, arrogance, fear, and nationalism can accelerate conflict; prudence, communication, and strategic imagination can help avoid it.
What makes the book unsettling is not that Allison predicts war, but that he demonstrates how intelligent leaders throughout history have stumbled into wars they neither wanted nor expected. Thucydides understood that nations often drift toward catastrophe through a series of decisions that seem reasonable at the time.
For me, Destined for War was more than an exercise in strategic analysis. It was painful to read because Thucydides has long been one of my favorite historians. To see an ancient warning become part of the political vocabulary of our own age—and to watch leaders in both Washington and Beijing invoke it—is to recognize that under Trump we are a declining power because he ignores history in his arrogant ignorance.
Allison cannot tell us whether the United States will avoid the Thucydides Trap. But he reminds us why understanding history matters. The first great historian still has something urgent to say to the twenty-first century, and we ignore him at our peril.









