This book analyzes the interactions of international criminal tribunals established since the 1990s with international, national and regional bodies, making recommendations for the International Criminal Court (ICC) as it goes forward. Placing the core issues within the statutory framework of the Rome Statute and major policy considerations, the authors examine ways in which the ICC can best coordinate with other accountability mechanisms on national and regional prosecutions, the UN Security Council, cooperation on the enforcement of arrest warrants, national non-judicial processes and amicus briefs from non-governmental organizations (NGOs). This timely evaluation of the experiences of the ad hoc international criminal tribunals spotlights the legal, political and coordination issues that will likely impact the ICC's current mandate to adjudicate core international crimes. It explores how governments, inter-governmental bodies and global civil society might best collaborate to strengthen national capacity to investigate and prosecute atrocity crimes in pursuit of global justice. The book also considers the challenge of state cooperation with international criminal tribunals, identifying lessons for the ICC, while emphasizing the need for positive complementarity between the emerging African Criminal Court and the ICC. Lawyers, judges, NGOs, government officials, academics, and policy makers at all levels will value this book as an important resource on transitional justice and the place of justice in the aftermath of conflict and mass atrocity.