I found these two extracts of a speech by President Kennedy on 10 June 1963:
Our problems are manmade; therefore, they can
be solved by man. And man can be as big as he wants. No problem of human
destiny is beyond human beings. Man's reason and spirit have often solved
the seemingly unsolvable, and we believe they can do it again.
and
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.
JFK was talking about about peace but his words seem to apply perfectly to the problem of climate change. How big can world leaders be in Copenhagen in December? Will Man's reason be applied to the problem? We all breathe the same air and we are all mortal.