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. The posting 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.
In his lifetime, he was best known for his History of the United States During the Administrations of Thomas Jefferson and James Madison, a nine-volume work, praised for its literary style.
His posthumously published memoirs, The Education of Henry Adams, won the Pulitzer Prize and went on to be named by the Modern Library as the best English-language nonfiction book of the 20th century.