Modern India is the world's largest democracy, a sprawling, polyglot nation containing one-sixth of all humankind. The existence of such a complex and distinctive democratic regime qualifies as one of the world's bona fide political miracles. Furthermore, India's leading political thinkers have often served as its most influential political actors--think of Gandhi, whose collected works run to more than ninety volumes, or Ambedkar, or Nehru, who recorded...