Here is something we all should read.....

John McCarthy's Home Page...........Professor Emeritus (as of 2001 Jan 1) of Computer Science at Stanford University.......more specifically.....read this-

This Web page and its satellites are aimed at showing that human material progress is desirable and sustainable

so debunk you're liberal friends. Show them the math. Show them that we humans, despite our deficiencies are still capable of progress.......