The concept of an absolute morality is upheld for the most part by the religious, each religion competing for the acceptance of their particular absolute morality. On the other side of the debate are the voices of atheism who generally declare that relative morality is, by its very flexibility, preferable to the unyielding absolute morality of religion.
Let's pretend for a minute that the theory of evolution is a scientifically proven fact. Let's pretend that evolutionary theory is the fruit of scientific method as defined by the Oxford English Dictionary, i.e., "...consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses." You know what I mean, actually based on empirical or measurable evidence.
If God created our universe, then God must exist outside of our universe. It follows that He isn’t subject to any of the limitations and constraints of our universe such as the laws of physics that we know are themselves operative only within space and time. This aligns with our belief that God is eternal.