Doping is like a monster with a thousand heads; defeating it seems like a huge labor of Hercules; to defeat it, the concept of sport must be re-established, using all resources (athletes, families, schools, sports clubs, institutions, media). The author carries out a careful analysis of the physiological, social and psychological causes of the phenomenon; in addition to the health risks (documented in the Appendix by Dr. Lorenzo Baldini, sports doctor), the related psychological aspects are also considered in detail.