Donald Trump's long-term impact on US foreign policy is uncertain. But the debate about it has revived a longstanding question: Are major historical outcomes the product of human choices or are they largely the result of overwhelming structural factors produced by economic and political forces beyond our control?

Joseph Nye writes that many partisans accused President George W. Bush of lying and pressuring the intelligence community to produce intelligence to justify a war that Bush had already chosen to prosecute. The situation was complicated, however, and to understand the problems of speaking truth to power, the myths must be cleared away.

President Donald Trump's manipulation of America's privileged international system will strengthen other countries' incentives to extricate themselves from US networks of interdependence in the long run. In the meantime, there will be costly damage to the international institutions that limit conflict and create global public goods.

This week Project Syndicate catches up with Joseph Nye, Professor at Harvard University, and author of Is the American Century Over? and the forthcoming Do Morals Matter? Presidents and Foreign Policy from FDR to Trump.

A sampling of recent books from Belfer Center authors and affiliates.

Understanding deterrence in cyberspace is often difficult, because  minds remain captured by an image of deterrence shaped by the Cold War: a threat of massive retaliation to a nuclear attack by nuclear means. A better analogy is crime: governments can only imperfectly prevent it.

As democracies respond to the sharp power of foreign actors, they must not undercut their own soft power by imitating the authoritarian model.

Many in the current US administration argue that soft power does not matter much; countries cooperate out of self-interest. But this misses a crucial point: cooperation is a matter of degree, and the degree is affected by attraction or repulsion, not just weapons and sanctions.