The classical legacies of political thought, from Plato to Nietzsche, and the immediate tasks of running the world, at home and abroad, have been of most concern to the Right. Normative philosophical constructions have become a specialty of the Centre. Economic, social and cultural investigations – of past and present – dominate the output of the Left. Any attempt to come to grips with all three outlooks is thus obliged to traverse quite variegated ground.