Let's consider this part:
"A hundred years ago the philosophical radicals formed a school of intelligent men who were just as sure of themselves as the Hitlerites are; the result was that they dominated politics and that the world advanced rapidly both in intelligence and in material well-being."
Another example of this is neo-liberal capitalism: from Hayek  and his disciple, Friedman , to myriad think tanks, Reagan and Thatcher, SCOTUS (eg Powell ), etc. We're still living with the outcome of a generation of intelligent, organized, ambitious people united by a [flawed] ideology.
 Hayek - "The Road to Serfdom" http://amzn.to/1PRWyDj
 Friedman - "Free to Choose" http://amzn.to/1QKIewt
 Powell - "Attack on American Free Enterprise System" http://bit.ly/1Q2bHR7
Any comments about the enthusiasts for the currently totally unsustainable welfare states set up in the West along with the massive associated debts to be loaded onto the backs of those as yet unborn?
it was a case in point