Atheism and morality

[simplexity]

One of the major problems is that morality instructs/favours whereas a law of nature (or supernature) does not. So this kind of view will be entirely unable to account for morality's instructing nature.

You keep saying morality has an instructing nature. Why? Please prove this. You keep using your premise that is has an instructing nature(which in itself has not proof) to argue against others. If you want to continue using the word 'instructive', morality has an instructive nature the same way pain does. You have a choice to ignore the pain of touching a burning hot frying pan, but because of the chemical reactions/nerve patterns you will probably rather not continue to touch the pan. Key phrase here is you have a choice. You can burn yourself if you wish. Same way with morals which work in basically the same way. We all have what are mirror neurons(or most of us), which when harm is done to another the same pain we see, or hear is literally transmitted back to our brain by our own neurons. This is only one example.

Why are you sure morality exists? Moral sensations and beliefs exist.

Semantics. I am not saying it exists in a literal sense. It can only exist because we exist, otherwise it would be pointless to talk about it. It doesn't exist in a literal sense. It exists as a concept. Concepts and reason follow our own sensations and observations. It is a follow up to our own reactions in the real world added into a sense of reason. You do know there is a nerve effect which causes your chest to swell when you see a group of people being helped. Just another interesting fact.