Ronald J. Glasser is an American physician and author, best known for his work in the field of medicine and his writings on the human experience in war. He gained prominence with his book, 365 Days, which reflects on his experiences as a doctor during the Vietnam War, providing insights into the challenges faced by medical professionals in combat situations. In addition to his medical career, Glasser has written several other books and articles that explore themes of trauma, healing, and the impact of war on individuals and society. His contributions have made him a notable figure in discussions about the intersection of medicine and military service.