From the New York Times' 5-page eulogy of the "telegenic" Susan Sontag:
She could be provocative to the point of being inflammatory, as when she championed the Nazi filmmaker Leni Riefenstahl in a 1965 essay; she would revise her position some years later. She celebrated the communist societies of Cuba and North Vietnam; just as provocatively, she later denounced communism as a form of fascism.
In other words, she was wrong when it mattered the most -- and right when it was so late that nobody even paid attention. (Who ever heard of Susan Sontag, ardent anti-communist?)