As the tensions involving religion and society increase, the European Court of Human Rights and the Freedom of Religion or Belief is the first systematic analysis of the first twenty-five years of the European Court's religion jurisprudence. The Court is one of the most significant institutions confronting the interactions among states, religious groups, minorities, and dissenters. In the 25 years since its first religion case, Kokkinakis v. Greece, the Court has inserted itself squarely into the international human rights debate regarding the freedom of religion or belief. The authors demonstrate the positive contributions and the significant flaws of the Court's jurisprudence involving religion, society, and secularism.