The Fourteenth Midwest Conference on Endocrinology and Metab olism, held at the University of Missouri - Columbia on September 28th and 29th, 1978, brought together several prominent researchers who are authorities on various aspects of the renin-angiotensin system. Each speaker presented an in-depth coverage of a topic related to his own area of expertise, including recent findings from his own research laboratory. Following each presentation thet:e was a general discussion of the material by the speaker and the audience. These presentations and the ensuing discussions are summarized in these published Proceedings. Traditionally the Midwest Conferences on Endocrinology and Metabolism have emphasized breadth as well as depth of coverage of the selected topic; the present Conference is no exception. Perusal of the titles of the presentations will reveal that the Conference dea1th with many different facets of the renin-angiotensin system, including the biochemistry, anatomy, physiology, and comparative endocrinology of this hormonal system, plus special areas of con sideration such as angiotensin receptors, angiotensin-converting enzyme, the control of renin release, angiotensin and aldosterone secretion, and the role of the renin-angiotensin system in the central nervous system. The selection of the renin-angiotensin system as the topic for the present conference was very timely because of the many noteworthy advances in this area in recent years, many by the participants in the Conference. The Editors are very appreciative of the excellent manuscripts which the speakers provided for these Proceedings.