By 1907, the first of the three years em­braced by Volume 4, Dewey had aban­doned thoughts of a possible career in the administration of higher education and was firmly established as a leading member of the Department of Phi­losophy at Columbia. As Lewis Hahn points out in his Introduction, these were "very productive years for Dewey. In addition to numerous lectures and speaking engagements and participa­tion in professional meetings, he pub­lished fifteen or so substantial articles, almost as many shorter things, a syl­labus on The Pragmatic Movement of Contemporary Thought, a monograph on Moral Principles in Education, and, with J. H. Tufts, the first edition of a very popular textbook, Ethics."