Click through to the debate and read Horowitz' side: http://www.economist.com/debate/days/view/710 http://www.economist.com/debate/days/view/710 He has some pr

Click through to the debate and read Horowitz' side: http://www.economist.com/debate/days/view/710 http://www.economist.com/debate/days/view/710 He has some pretty compelling graphs and arguments for his position!