Part 4 covered Marx and Weber as thinkers. This lesson treats their accounts of class as what they also are: rival instructions for sorting a real population into groups.

That is a more demanding test than it sounds. A scheme has to say what to do with every case, produce groups that behave differently, and explain why the line falls where it does. Run the two schemes over the same five people and they disagree — not everywhere, but at exactly the points where most of the modern population sits.

The two schemes, precisely

What each does with the awkward cases