David Sackett was a prominent Canadian physician and researcher, widely recognized as one of the founders of the field of evidence-based medicine. He played a crucial role in promoting the integration of clinical expertise with the best available research evidence to improve patient care. His work emphasized the importance of using scientific research to inform medical decisions. Sackett was also a professor at McMaster University in Hamilton, Ontario, where he contributed to medical education and the development of clinical practice guidelines. His legacy continues to influence healthcare professionals and researchers, encouraging a more systematic approach to medical practice and decision-making.