Kant changed philosophy to such a degree that we add pre- or post-Kantian when discussing almost any philosophical approach or set of ideas. In The Metaphysics of Morals, Kant's most accessible work, we have the opportunity to come face to face with this approach that revolutionised the history of ideas.
This book is the source of his famous 'Categorical Imperative', the maxim that one should "Act only according to that maxim whereby you can, at the same time, will that it should become a universal law.".
The books contents are beautified with the photography of Patrick Durston with the series of butterflies representing the various flights of the mind.
