In his new book, Why Leaders Lie: The Truth About Lying in International Politics, political scientist John Mearsheimer poses that provocative question of when is it justified, or not, for leaders to lie to other leaders, to other nations or to their own citizens.

Mearsheimer is regarded as one of the foremost realist thinkers on foreign policy. He’s renowned for his book on offensive realism called, The Tragedy of Great Power Politics, and a few years ago he attracted great attention for co-authoring the book, The Israel Lobby and U.S. Foreign Policy.

In Why Leaders Lie, Mearsheimer provides the first systematic analysis of lying as a tool of statecraft, identifying the reasons why our leaders lie to us along with the potential costs and benefits.