Abstract The investigation of consensus was a leading theme in the political sociology of democracy from the early 1950s until the late 1960s. Consensus has since become something of a suspect category of social inquiry. The consensus literature (V. O. Key, R. Dahl, H. Eckstein, S. M. Upset, G. A. Almond) has been charged by the ‘post‐behaviouralists’ as conservative politics disguised as impartial social science. This paper investigates the possibility of restoring consensus as a research category through an examination of its original use by John Stuart Mill. The link between Mill and contemporary political sociology is Edward Shils, who is here identified as one of the guiding spirits of the consensus literature. The paper compares consensus as treated in Mill's explicitly political science with Shils’ implicitly political science. The ‘post‐behaviouralists’ sought the recovery of the political as the leading theme of social inquiry. This is exactly as Mill originally intended. The consensus literature...