This book brought together the most authoritative theologians and biblical scholars of the 20th century, such as James Dunn, Gerd Theisen, Ulrich Lutz, Raymond Brown, Jürgen Roloff, Ernst Kezeman and others belonging to various faiths. All of them set themselves the most difficult task: to show that the unity of Christian churches is necessary and possible, especially in the face of the increasingly secularization of modern society.