Philosophy of dialogue is a type of philosophy based on the work of the Austrian-born Jewish philosopher Martin Buber best known through its classic presentation in his 1923 book I and Thou. For Buber, the fundamental fact of human existence, too readily overlooked by scientific rationalism and abstract philosophical thought, is "man with man", a dialogue which takes place in the "sphere of between" (German: das Zwischenmenschliche). Source: Wikipedia (en)