Full Idea
We can see the Kantian 'Moral Law' as consisting precisely in those rules which rational beings would accept, when attempting to live by agreement.
Gist of Idea
Kant's Moral Law is the rules rational beings would accept when trying to live by agreement
Source
Roger Scruton (Animal Rights and Wrongs [1996], p.30)
Book Reference
Scruton,Roger: 'Animal Rights and Wrongs' [Demos 1996], p.30
A Reaction
If this combines Kantian notions of duty with the obligations of contracts, it is the core of a very powerful moral theory. See the work of Tim Scanlon. Classic problems are still the weak, animals and free riders.