Venkatesh Rao@vgrRT @TheMan: . @vgr just laid the smackdown so hard on Quora I immediately bought his book http://quora.com/The-United-States-of-America/Why-is-the-United-States-of-America-so-much-wealthier-than-other-countries?srid=Q… #IndependentThinker //thanks!10:23 PM · Aug 27, 20111 Retweet2 Likes