German jurist and legal theorist Carl Schmitt (1888-1985) significantly influenced Western political and legal thinking in the last century, yet his life and work have also stirred considerable controversy. While his ideas have been used and diffused by prominent philosophers on both the left and the right, such as Jurgen Habermas and Leo Strauss, his Nazi-era past, especially his active efforts to remove Jewish influence from German law, has cast a cloud over his life and oeuvre. Still, his many supporters have generally been successful in claiming that Schmitt's was an "antisemitism of...