The chart is also extremely lacking on the Marxian front, and also on the Post-Keynesian and Sraffian fronts. It's laughable that the only descendant of Marx's

The chart is also extremely lacking on the Marxian front, and also on the Post-Keynesian and Sraffian fronts. It's laughable that the only descendant of Marx's line of thought is a non-Marxist, Joan Robinson. Paul Samuelson is included but there's nothing of the debates with him from the Sraffian and Marxist schools. There's no mention of the Japanese Marxists, either. I don't know if the fact that Marx's line connects to Malthus rather than the whole box for the classical school means anything, but if it should be connected to anyone in that box, it should be connected to Ricardo, not Malthus. It's an admirable attempt, but the chart is lacking in at least one area I can identify, so it could easily be lacking or outright wrong in others.