The merits of the argument aside, Mr. Buckley irrevocably proved that his brand of candor did not lend itself to public life when an Op-Ed article he wrote for The New York Times offered a partial cure for the AIDS epidemic: “Everyone detected with AIDS should be tattooed in the upper forearm to prevent common needle users, and on the buttocks, to prevent the victimization of homosexuals,” he wrote.

In his last years, as honors like the Presidential Medal of Freedom came his way, Mr. Buckley gradually loosened his grip on his intellectual empire. In 1998, he ended his frenetic schedule of public speeches, about 70 a year over 40 years, he once estimated. In 1999, he stopped “Firing Line,” and in 2004, he relinquished his voting stock in National Review. He wrote his last spy novel (the 11th in his series), sold his sailboat and stopped playing the harpsichord publicly.

But he began a new historical novel and kept up his columns, including one on the “bewitching power” of “The Sopranos” television series. He commanded wide attention by criticizing the Iraq war as a failure.

On April 15, 2007, his wife, the former Patricia Aldyen Austin Taylor, who had carved out a formidable reputation as a socialite and philanthropist but considered her role as a homemaker, mother and wife most important, died. Mr. and Mrs. Buckley called each other “Ducky.”

He is survived by his son, Christopher, of Washington; his sisters Priscilla L. Buckley of Sharon, Conn., Patricia Buckley Bozell of Washington, and Carol Buckley of Columbia, S.C.; his brothers James L., of Sharon, and F. Reid, of Camden, S.C.; a granddaughter; and a grandson

In the end it was Mr. Buckley’s graceful, often self-deprecating wit that endeared him to others. In his spy novel “Who’s on First,” he described the possible impact of his National Review through his character Boris Bolgin.

“ ‘Do you ever read the National Review, Jozsef?’ asks Boris Bolgin, the chief of KGB counter intelligence for Western Europe. ‘It is edited by this young bourgeois fanatic.’ .”