Henry Brooks Adams (February 16, 1838 - March 27, 1918) was an American historian and member of the Adams political family, being descended from two U.S. Presidents. As a young Harvard graduate, he was secretary to his father, Charles Francis Adams, Abraham Lincoln's ambassador in London, a posting that had much influence on the younger man, both through experience of wartime diplomacy and absorption in English culture, especially the works of John Stuart Mill. After the American Civil War, he became a noted political journalist who entertained America's foremost intellectuals at his homes in Washington and Boston.