Answer
A.S. Byatt described George Steiner as a "late, late, late Renaissance man" because he was a polymath who had a wide range of interests and expertise. He was a philosopher, literary critic, and translator, and he wrote on a variety of subjects, including literature, art, music, and religion. Byatt admired Steiner's intellectual breadth and depth, and she believed that he was a unique figure in modern intellectual life.