Transitional justice and diaspora studies are interdisciplinary and expanding fields of study. Finding the right combination of mechanisms to forward transitional justice in post-conflict societies is an ongoing challenge for states and affected populations. Diasporas, as non-state actors with increased agency in homelands, host-lands, and other global locations, engage with their past from a distance, but their actions are little understood. Diaspora Mobilizations for Transitional Justice develops a novel framework to demonstrate how diasporas connect with local actors in transitional justice processes through a variety of mechanisms and their underlying analytical rationales—emotional, cognitive, symbolic/value-based, strategic, and networks-based. Mechanisms featured here are: thin sympathetic response and chosen trauma, fear and hope, contact and framing, cooperation and coalition-building, brokerage, patronage, and connective action, among others. The contributors discuss the role of diasporas in truth commissions, memorialization, recognition of genocides and other human rights atrocities, as well as their abilities to affect transitional justice from afar by holding particular attitudes, or upon return temporarily or for good. This book sheds light on how diasporas’ contextual embeddedness shapes their mobilization strategies, and features empirical evidence from Europe, United States and Canada, as well as from conflict and postconflict polities in the Balkans, Middle East, Eurasia and Latin America. It was originally published as a special issue of Ethnic and Racial Studies.