Mark Kleiman is consistently brilliant. I actually don't know from what field he specialised to be an expert on drug policy, since he seems expert on everything.
However, in response to this post, I really have to say "Same 'difference'"
here "the differences among the (abusable) drugs are as great as the differences."

This, is brilliant and lacks funny typos, although I think that Roberts is as good a nominee as we are going to get.