Atheism, A Grim Position?

[JuliaL]

Yes, but you didn't answer my question: Is that somehow fundamentally wrong irrespective of what society thinks? If so, how?

You're going to have to be more clear about what you mean by 'fundamentally.' I would say that any action by itself is amoral. It is only when it is placed in the context of a replicating pattern that it gains the status of moral or immoral, right or wrong. And each instance will have a different rightness or wrongness depending on from where it is being observed. In the view of the bear, killing the hiker is right. In the view of the hiker it is wrong.