Judith Eve Lipton, M.D. is a psychiatrist and Distinguished Fellow of the American Psychiatric Association. Lipton has been married for 39 years to Professor David Barash; they have coauthored 8 books, on sex, war, and human nature (sometimes all at once, sometimes not.) Her latest book, The Pura Vida Paradox: Demilitarization and Well-Being in Costa Rica, is being published by Oxford University Press. Now Lipton and Barash are off to demystify and demolish nuclear deterrence theory.