When George W. Bush campaigned for the White House, he was such a novice in foreign policy that he couldn?t name the president of Pakistan. But he was advised by a group that called themselves the Vulcans?a group of men and one woman with long and shared experience in government, dating back to the Nixon, Ford, Reagan, and first Bush administrations. After returning to power in 2001, the Vulcans?including Dick Cheney, Donald Rumsfeld, Colin Powell,...