Book excerpt: This edited volume presents selected papers focusing on Ronald Fisher’s cumulative contributions to understanding destructive intergroup conflicts from a social-psychological perspective, and to the development and assessment of small group, interactive methods for resolving them. Highlights include schematic models of third party consultations, intergroup conflicts, and a contingency approach to third party intervention. Overall, the selected texts offer a comprehensive description and clear rationale for interactive conflict resolution and its unique contributions to peacemaking.