Among the signal achievements of the Second Vatican Council is the Roman Catholic Church rsquo s irreversible commitment to the cause of Christian unity How did the church come to change its preconciliar triumphalist insistence on the ldquo return rdquo of ldquo schismatics and heretics rdquo

Yves-Marie Congar, O.P., was the 20th century’s leading Catholic ecumenical theologian and one of the most influential contributors to the Second Vatican Council. Pope John Paul recognized his outstanding service to the church when he named him a cardinal not long before he died in 1995 at the