I don't even know if Walt's been in much of a moral decline. He's shown more willingness to get his own hands dirty, and more confidence in his criminal pursuits, but his perception of right and wrong hasn't changed that much. Right, to him, is what benefits him. There's not much he thinks of as wrong. Even in the episodes when he's shown compassion it's usually so he can manipulate someone else. I don't know that he was on a moral high ground to begin with.
|