What is the source of morality?

Source of Morality
In our group we discussed it and we voted "Social and political traditions" and I partially agree. However, there is another option that can be the greater source to it, "Human Nature". We humans are the ones that created society and politics, we are the ones that determined where, how, when, what, etc. We are the ones that created religion as well, which is for most people the source of morality. Which sometimes is emphasized by politics and society. We humans created/discovered science, religion, society, etc.
It is easy to say that religion is the source of morality, yes religion is because it shows whats right or wrong. Politicians do the same "He is doing wrong, I will do right...". Society says this wrong and the society believes it. But where is does society and politicians come from? where does religion come from? not from God, but from human beings. Yes there might be a superstitious belief that the human that created all these could be God, ofcourse its all a matter of believing, but we can never be too sure of that. But we can be sure that human nature is the one that created such things, hence is the source of morality.