460-377 BC - HIPPOCRATES - Believed in the four humours theory and developed by doing natural treatments.
384-322 BC - ARISTOTLE - Developed Hippocrates theory by linking disease to it
129-199 AD - GALEN - Also believed four humours theory and used it to disect animals to learn more
1510-1590 - PARE - Barber who was forced to improvise as a doctor
1514-1564 - VESALIUS - Wrote books…