The document summarizes key events in the historical development of medical research ethics regulations and guidelines to protect human subjects, beginning with the 1932 Tuskegee Syphilis study. Major milestones included the 1946 Nuremberg Code, the 1964 Declaration of Helsinki, the 1974 National Research Act establishing regulatory oversight in the US, and the 1979 Belmont Report providing ethical principles. The history shows how abuses of human subjects led to increasingly stringent informed consent standards and review board oversight of research to prevent harm.