In 1987 *Merck & Co., Inc., made history with the unlimited donation of Mectizan to end river blindness—as much as needed, as long as needed. This decision is part of the company’s ongoing commitment to corporate responsibility.

What does it really take to be a responsible business? To find out, Merck chief patient officer Dr. Julie Gerberding sits down with former CEOs Dr. Roy Vagelos (1985-1994), Dick Clark (2005-2011), and Ken Frazier (2011-2021); and current Merck CEO Rob Davis. Together, they look back at their accomplishments with an eye to the future.