Earlier quoted context omitted.
Mesopothemia was based on morals as far as we know, and they lay the foundation for many technical and scientific advances. And your rights are based on religious and ideological morals. Why do you believe the debate about Roe v. Wade exists? Why do we consider infidelity so bad it can break a contract of marriage? What is marriage? Those are not laws of nature.
Your right to not be attacked, robbed, or defrauded by others is inherent, not something conferred by religion or morality. As for abortion, the debate there rests on a conflict of the rights of two people, and there isn't any clear answer to it based on rights. Marriage is tangled up with the rights of children. Children are not fully formed humans and we allot them a subset of the rights of adults. Marriage without…
It most certainly isn't. Inherent from where or what? In nature, I have no right not to be attacked by a lion or a pack of wolves, so surely this right cannot exist outside society, and then how can it derive from something outside society? Without a God, man in nature has no rights, though you can follow Hobbes and assert some principles from an idea of universal morality. I'm not aware of any serious philosopher who pretends to be able to derive any right at all without religion or morality.