A memorial for Ambassador-at-Large to Monitor and Combat Trafficking in Persons, John R. Miller (May 23, 1938-October 4, 2017). Ambassador Miller believed modern-day slavery, encompassing sex trafficking and forced labor, requires a principled global offensive that the United States is morally obligated to lead. In the four formative years he led the State Department’s Office to Monitor and Combat Trafficking in Persons, 2002 to 2006, John Miller set the office’s course as diplomatically aggressive and programmatically creative. He made the annual Trafficking in Persons report more than a bureaucratic submission, putting daring heroes at the center, and insisting on compelling field reporting. He humbly deferred to experts: Survivors, activists, and NGOs living on air, working around the world to confront the trafficking phenomenon in its innumerable guises. He consulted them regularly. Their knowledge became his wisdom.