the hedgehog and the fox

In 'The hedgehog and the fox' (*), the philosopher Isaiah Berlin, the author of the famous "Praise of freedom", wonders by rereading the work of Tolstoy on the causes of human destiny from a line from a Greek poet: 'The fox knows many things, the hedgehog knows only one, but great!' For the professor of Oxford, rather hedgehog, freedom is a fundamental value in the midst of an irreducible pluralism of values.