Detail, President Kennedy’s official, posthumous presidential portrait, by Aaron Shikler (public domain)

So let us not be blind to our differences, but let us also direct attention to our common interests and the means by which those differences can be resolved. And if we cannot end now our differences, at least we can help make the world safe for diversity. For, in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children’s futures. And we are all mortal.

President John Fitzgerald Kennedy, American University, June 10, 1963