Let me explain. When scientists calculate the speed of light, we assume they're measuring something that has been ever thus. Light moves at 186,000 miles per second not because some 19th Century physicists put a speed gun on solar rays, but because that's how things are. Mankind did not create the fact. Men discovered it.
Global religions approach morality the same way.
Murder isn't wrong merely because it is an inconvenient way of resolving disputes. It is wrong, period, even when people aren't killing each other. Ethical facts thus are as true as the speed of light, and as integral to the scheme of things. If religious verities are true, it follows that men didn't concoct them. This is a crucial development because it undermines any government that exalts man as the measure of all things.