In this contribution we deal with the sociological positivism of Danish philosopher and sociologist Svend Ranulf (1894-1953). Next to his major writings, this paper considers some of Ranulf’s minor works, in order to shed light on some controversial aspects of his thought. This paper focuses, in particular, on the meaning of the notions of ethos and propaganda in Ranulf’s epistemology, in order to re-evaluate his late studies on democracy and political communication, with special attention given to the early post-war continental debate on propaganda.