\'The fox knows many things, but the Hedgehog knows one big thing.\' This ancient Greek aphorism, preserved in a fragment from the poet Archilochus, describes the central thesis of Isaiah Berlin\'s maste.... \'The fox knows many things, but the Hedgehog knows one big thing.\' This ancient Greek aphorism, preserved in a fragment from the poet Archilochus, describes the central thesis of Isaiah Berlin\'s maste...