"Can we and all nations not live 
in peace? 
In our obsession with antagonisms of the moment, we often 
forget how much unites all the members of humanity. Perhaps we need some
 outside, universal threat to make us recognize this common bond. 
I 
occasionally think how quickly our differences worldwide would vanish if
 we were facing an alien threat from outside this world. 
And yet, I ask 
you, is not an alien force already among us? What could be more alien to
 the universal aspirations of our peoples than war and the threat of 
war?"
- President Ronald Reagan in an address to the United Nations General Assembly on September 21, 1987. 
Image source unknown but greatly appreciated. 

