This book contains fresh insights into ecumenism and, notwithstanding claims of an “ecumenical winter,” affirms the view that we are actually moving into a “new ecumenical spring.” It offers new theological insights in the areas of Christology, Pneumatology and Trinitarian theology, and discusses developments in ecumenism in the USA, UK, Australia, India, and Africa, as well as in ecumenical institutions such as the World Council of Churches (WCC) and the Anglican Roman Catholic Commission (ARCIC).