I don't believe in universal truths. I think absolutely everything is relative and we are spiritual beings meant to dwell on and create the nature of reality. Cultural diversity, or the ethnosphere, is probably the most valuable resource we have because it speaks to what makes us human and it feeds the soul.
I am a huge fan of Wade Davis' work.
"We don't really believe you went to the moon, but you did. You may not believe that we achieve enlightenment in one lifetime, but we do". -- Tibetan monk to Wade Davis