Each species of our primate cousins is unique as it represents the outcome of independent evolution. Yet, humans appear to be a remarkable outlier as we have numerous characteristics so far un-described in any other primate. Why should this be? This symposium will address several important distinctly human "biologically enculturated" characteristics, both in relation to each other and in contrast to our evolutionary cousins, and will also help to organize how and in what sequence distinctly human physical, mental, social, and cultural features evolved. (#36197)