This book investigates the pervasive nature of threats across biological and human systems to determine whether the reliance on intimidation as a deterrent is fundamentally counter-productive. David P. Barash, a professor of psychology and evolutionary biology, synthesizes data from animal behavior, human psychology, and international relations to argue that the escalation of counter-threats often exacerbates the very dangers they are intended to mitigate. He provides a framework for understanding how evolutionary pressures shape our perception of danger and how these instincts translate into modern political and social conflicts.

Experts and reviewers note the author's ability to bridge complex biological concepts with pressing contemporary political issues. Readers frequently highlight the clarity of the prose and the provocative nature of the arguments regarding nuclear deterrence.