That is hardly true. Egyptian laws and Hamurabi's code had already codified considerably more advanced legal concepts.Actually, not killing people was a pretty radical ideology at the time of the ten commandments, which is why so few people actually followed it.
That only proves my point. When the bible was written, slavery was the norm and it gives advice on dealing with your slaves. The radical change in thought happened more than 1000 years later. It is clear cut case of religious justification for what was a shift in social attitudes.Often religion spurred major moralistic changes. The principle of freedom in America was spurned by the notion of all men being created equal under god, a sentiment that carried to the inevitable abolitionist movement and was Martin Luther King Jr's well vocalized motivation for his fight as well.