Initially I did not care for the tone of this chapter on morality but after I checked myself, I realized that he was basically teaching it the way the majority of society, both inside and outside the church, see it. There is a lot of correction needed in our theology inside the church so that those outside the church can see the truth. This is not an easy task for many reasons and all we can do individually is try to teach those around us.
Later in the chapter he started talking about the zeitgeist – the spirit of the times. It was an interesting walk through history. He ended this section of the chapter on morality with this gem.
It is beyond my amateur psychology and sociology to go any further in explaining why the moral Zeitgeist moves in its broadly concerted way. For my purposes it is enough that, as a matter of observed fact, it does move, and it is not driven by religion—and certainly not by scripture. It is probably not a single force like gravity, but a complex interplay of disparate forces like the one that propels Moore’s Law, describing the exponential increase in computer power. Whatever its cause, the manifest phenomenon of Zeitgeist progression is more than enough to undermine the claim that we need God in order to be good, or to decide what is good. –The God Delusion by Richard Dawkins
I think Dawkins did a good job undermining the claim that we need God in order to be good.