Morality comes from the human brain, and is what binds communities together, and helps them work together rather then greedily killing one another.
I think that on most basic matters of morality, most people are pretty good judges. EG I don't think anyone would say you should kill a little girl in order to steal her candy.
It's when things get more complex that it becomes more murky, and you need philosophy and reason to figure it out. For instance, is it just to steal to feed your starving children? Is it unjust for a group to commit infanticide knowing that keeping the baby will jeopardize the existence of the entire group (as they know they lack the means to feed it as it grows older)? All the legal disputes you have going on today are between differing competing systems of morality, and also due to grey areas that have never been fully reasoned out. For instance, can you own an
idea?
Certain IT companies seem to think you can....