Is There a Class Divide in the World?

In the world, like there is now the creation of a knowledge class. They estimated in the 70s that it was at that time around 25% of the workforce. People now say it's roughly like 35 to 40%. And this is not one of the defining features of like our politics, our economy, our society. It's changed things in so many different ways and David Brooks is interested in none of these ways.