Though integration has been well worked over by agricultural economists, it still deserves further thought, because of differences in the insight and outlook of people, and partly because integration deals with topics of enduring interest—shifting enterprise combinations. In this paper, the author discusses a few significant facts and ideas about integration that are not widely appreciated and, anyway, do merit restatement since they will help economists to focus on emerging problems. Some of the ideas in the paper were presented at the Western Regional Marketing Workshop for extension workers in agricultural marketing at Salt Lake City in 1961. The comments of Stephen Hiemstra, Martin Kriesberg, Ronald Mighell, William Waldorf, and William Wesson of ERS are gratefully acknowledged.