darrell, I wouldn't say that "anything goes", but yes, the idea of "moral absolutes" is unfounded and "morals" will be different from one culture to the next. However, each culture still must work to the betterment of all the people. This doesn't happen all the time. The best example, currently, is what's happening in Egypt. You have an IMmoral leader and the people are rising up against him. Oddly, that is all happening in a culture who is even MORE "god centered" than the United States.
For the rest of the posters on this thread:
This "moral nature", I believe, is an emergent property with not just us, but any species who has determined that cooperation of the whole is of much greater benefit than solitary roaming/effort. Do a study on social species.