Mirko Dražen Grmek (January 9, 1924 - March 6, 2000) was a Croatian and French historian of medicine, writer and scientist. He was one of the pioneers and founders of the history of medicine. His entire opus promotes the historical research of medical knowledge and practices by means of contemporary scientific methods, especially the study of the formation of ideas in specific societies and periods. He put forward the theory of pathocenosis, the coexistence of all diseases in a specific time, place and society