Acting on Principle

''Two things'', wrote Kant, ''fill the mind with ever new and increasing admiration and awe: the starry heavens above and the moral law within''. Many would argue that since Kant''s day, the study of the starry heavens has advanced while ethics has stagnated, and in particular that Kant''s ethics offers an empty formalism that tells us nothing about how we should live. In Acting on Principle Onora...