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@Tarik
Your reasoning seems to be something like this:
1. Without God the morality of human beings simply evolved by natural processes.
2. Any moral code that evolves by natural processes cannot be objective.
3. Therefore, a non-theistic morality cannot be objective.
The argument is deductively valid but nevertheless unsound. It is unsound
because premise (2) is false. Premise (2) is false because it assumes that if morality
is something that is only conceived by human beings, then since human beings
conceive it, it cannot be true independently of our beliefs. But a human origin for
morality does not negate its truth as something independent of the beliefs of any
person or group.
One example of a universal moral truth that is logically necessary and true
independently of anyone’s belief is the statement “murder is morally wrong.” The
term “murder” means “to kill unlawfully and with malice” or “the unlawful and
malicious killing of a human being by another.” It is universally and necessarily true
that “murder is wrongful killing,” whether anyone believes it or not and whether
or not there is a God.