Nozick, Robert
Links
The price of freedom
http://www.sinoliberal.net/nozick/price%20of%20freedom.htm
Obituary by Alasdair Palmer published originally in The Spectator (UK).
Constraints and Animals
http://www.animal-rights-library.com/texts-m/nozick01.htm
Section from Anarchy, State, and Utopia where the moral status of animals is considered from a libertarian perspective.