Innately. It is in our best interest as a species to not steal, kill, covet thy neighbors wife, etc. I am a big believer in the code of ethics, 10 commandments, etc. I just believe they were not handed down to us but we rose up and embraced them over generations. Morally, we are probably on the same page (I would assume since you are on FR). However, I believe that humanity is great enough to actually create absolutes and ethics without outside interference, hence the term humanist.
In fact, I would say that Humanists are true conservatives since they feel that the problems of the world are our own making and hence we won't be lifted out of them w/o us doing the lifting.
Ha, I just read your profile. I live in Woodland Park. Lost my dad in Vietnam so thanks for your service as well as the continued work at the Academy.