Never has the need for moral absolutes been more pressing than in this age of genocide and oppression, and yet as old certainties crumble into doubt and disillusion, cynicism often takes over from both religious faith and humanist confidence. If the appeal to a judging deity appears an evasion, even to believers, utilitarian head-counting seems no more than an exercise in ethical accountancy. This is where Kant comes in, as his moral philosophy continues to compel the attention of every serious thinker in the field. Clear, concise - and overwhelmingly convincing - Ralph Walker's lucid guide spells out the power and renewed relevance of his thinking: a genuinely objective, absolute basis for a modern moral law.