If you are an atheist and you know it, clap your hands.
http://en.wikipedia.org/wiki/Demographics_of_atheism
As usual the loudest in the room, are usually the ones in the back which are 'least' understood.
Thats, pretty much on the money , it's well documented that the Swedes are by and large an athiest society, and have one of the safest and most livable countries in the world .
And America has the highest representation of christianity and its well, lets just say not in the top ten of lovely places. !!