http://www.snopes.com/politics/soapbox/rooney4.asp
Sorry. Rooney didn't write this (it's an updated version of the one at my link). And contrary to other claims, it doesn't seem to have been written by Carlin, either. The author is unknown.
MGY
The author is unknown.
It was written by the lovable but cranky guy down at the end of every old man bar in America.