This is the manuscript of Sir William Osler's lectures on the "Evolution of Modern Medicine," delivered at Yale University in 1913. Here, the father of modern clinical medicine provides a brief introduction to the history of medicine from its origin to modern developments, such as the rise of preventive medicine. Originally written for the general public, the classic text is both engaging and informative, especially for those interested in healthcare professions, or medicine and history in general. - Summary by Cao Yuqing