From the NYT:

William F. Buckley Jr., who marshaled polysyllabic exuberance, famously arched eyebrows and a refined, perspicacious mind to elevate conservatism to the center of American political discourse, died Wednesday at his home in Stamford, Conn.

Mr Buckley, 82, suffered from diabetes and emphysema, his son Christopher said, although the exact cause of death was not immediately known. He was found at his desk in the study of his home, his son said. "He might have been working on a column," Mr. Buckley said.