I read this on his AMA on reddit today, and thought it was worth sharing :
"We live in turbulent times, and the sad truth is that our ancestors lived in turbulent times. It's always been a fact in the lives of all of humanity.
Star Trek talked about a time when people, at least on this planet, could work together, and embrace each other regardless of race, nationality, creed, etc. My advice is to try to create that future in the present. Try to love each other, put away the intolerance and the prejudice that still at this late juncture in the worlds existence seems to dominate in much of our thinking and actions.
I believe that humanity has a manifest destiny to continue to evolve, and ultimately to explore other worlds. We can only do that if we're good to each other, and make sure that there is a future to look forward to."