Jean-Pierre Willem, surgeon and anthropologist, has traveled the globe for forty years. Combining human sciences with biology, he became aware in the field of the great health disparities among certain peoples based on several criteria (food, psychological balance, physical and mental activities, environment, etc.). He chairs several institutes in Paris. He leads the "Barefoot Doctors," a humanitarian association using ethnomedicine and medicinal plants, and directs the Free Faculty of Natural Medicines, which is open to the public. All data collected in the field is recorded in the International Biological Union.