In this article I propose to analyze Lauri Honko’s contribution in comparative religion in terms of tradition ecology, the general research framework Honko himself saw – at least in retrospect – as the unifying theme in his work. My aim is to provide an analytical account of his theoretical contribution in the study of religion that started already in his dissertation Krankheitsprojektile (1959) and culminated in his last major work, Textualising the Siri Epic (1998). Lauri Honko’s research topics ranged from folk beliefs, myths and rituals to ethnomedicine, oral epics and cultural identity. Yet religion, understood as culturally mediated interaction with the culturally postulated supernatural entities, remained one of his constant objects of interest. Moreover, I will argue that the fluid nature of contemporary post-secular religiosity is well captured by the tradition-ecology tools developed by Honko. I will end up by discussing the contribution of Honko’s doctoral students in comparative religion and folkloristics.