Invoking the “great humanitarian” Roosevelt, Truman told the gathering in the Opera House: “You members of this Conference are to be the architects of the better world. In your hands rests our future . . . “The world has experienced a revival of an old faith in the everlasting moral force of justice,” Truman said. “At no time in history has there been a more important Conference, nor a more necessary meeting, than this one in San Francisco, which you are opening today.”