When first published in 1961, "Treasure in Earthen Vessels" was hailed by H. Richard Niebuhr as "the first real sociology of the church. " In this landmark work, James M. Gustafson examines the church as a human institution that must, and does, participate in the social structure of all human communities. His penetrating analysis remains an important contribution to the dialogue between the theological and social-scientific disciplines. Gustafson has written a new preface for this volume. The Library of Theological Ethics series focuses on what it means to think theologically and ethically. It presents a selection of important and otherwise unavailable texts in easily accessible form. Volumes in this series will enable sustained dialogue with predecessors though reflection on classic works in the field.