Some argue that the development of morality in civilization is guided by those in power. The rules are invented or changed to benefit those who make the rules. In small groups you see systems like communes that function as a formal or informal reciprocity. People as a rule are much more giving. They rely on each other more for survival. In large developed groups, the accumulation of large sums of wealth and property become possible. In these groups, rules reflect the desire of those in power to protect their wealth and property. In capitalist systems, a heavy emphasis is placed on respecting the rights of personal property. People are less likely to help those in their neighborhood in large cities than in poorer rural areas.
As these factors change with time and circumstance, the religious identity of that group changes and mutates as well. In this way we can see multiple groups in various states of "development".