Interesting. I downloaded the book to my books folder on dropbox for perusal in my next reading leisure session. I think the subgroup I was trying to mention

Interesting. I downloaded the book to my books folder on dropbox for perusal in my next reading leisure session. I think the subgroup I was trying to mention was the class who has managed to pull itself up through social organization (unions, guilds, etc.) and in the process has increased the incentive to disrupt the status quo (by making doing so more profitable). This will tend to attract disruptive technology (ubercab, khan academy, etc.)