There are no objective norms or values to constrain us, with authority over us. We are still free as a society to decide whether to alter, exaggerate or eliminate these differences. Freedom of ethical creativity. The function of the will is to make choices that further the realizations of other adaptations, including reproductive ones. If the will rebels against the genes, it is malfunctioning.
Ethical choice transcends the biological and the physical.
Based on a metaphysical theory, in which human consciousness represents something radically new, a complete discontinuity. Admits that this has no basis in biology. In classical tradition, not even God has this freedom. C. philosopher Duns Scotus is first to attribute it to God. Followed by Occam.