RACHEL M. MACNAIR is Director of the Institute for Integrated Social Analysis. A Psychologist and Sociologist, she is also author of Psychology of Peace: An Introduction (Praeger 2003) and Perpetration Induced Traumatic Stress: The Psychological Consequences of Killing (Praeger, 2002).STEPHEN ZUNES is Professor of Politics and International Studies at the University of San Francisco, where he chairs the Middle East studies program. He serves as a member of the advisory committee for the Tikkun Community and as the chair of the board of academic advisors for the International Center on Nonviolent Conflict. Previous books include Tinderbox: U.S. Middle East Policy and the Roots of Terrorism (2003) and Nonviolent Social Movements: A Geographical Perspective (1999).