I haven't read it, so I'm judging solely off of the title at this point, but, morally/philosophically/ethically right isn't the same thing as legally right.

And the world might be better if everyone was equal, there's no guarantee to equality. I was reading something earlier today, and there was a statement that implied that being human meant that someone had the right to be a 'full and productive' member of society. I question if that's really a right, and if so, what makes it so that humans have such a right, but not other animals (one could argue intelligence, but the arguments I've seen based on intelligence have only been surface deep, as in 'because intelligence').

Maybe I should read it (I've just put it on my list of things to read at some point). I can't really make a claim for or against arguments put in the book without reading them (and the Amazon reviews don't really want to go into any depth on what the arguments made are).