Being a comparison between Theist Morality and Atheist Morality, this video discusses the various moral precepts that we can all agree on and then delves into the major areas of disagreement.

I couldn't find good resources on the internet for where our ethics come from so here are some books I recommend that discuss the subject and point to other resources in their bibliographies.

The End of Faith: http://www.amazon.com/gp/product/0393327655?ie=UTF8&tag=dhtein-20&linkCo...