Imagine two parallel universes. Everything is exactly the same. In these universes, there exists a man whose desires, knowledge, experience, thoughts etc. are exactly the same. Exactly the same. In one Universe, he kills his wife; in the other, he doesn't. This is consistent with libertarian free will (that is, ability to make decisions regardless of desire, knowledge, experience, thoughts, past etc.), how can this man be held morally responsible or accountable? In fact, nothing in him, from his desires, experience or thoughts was the reason to why he did. How can one say that the man who killed his wife did something wrong? How can you punish him if his actions did not have anything to do with his desires, knowledge, experience or thoughts?