Before the Great Recession, I would sometimes give public lectures in which I would talk about rising inequality, making the point that the concentration of income at the top had reached levels not seen since 1929. Often, someone in the audience would ask whether this meant that another depression was imminent.

Well, whaddya know?

Did the rise of the 1 percent (or, better yet, the 0.01 percent) cause the Lesser Depression we’re now living through? It probably contributed. But the more important point is that inequality is a major reason the economy is still so depressed and unemployment so high. For we have responded to crisis with a mix of paralysis and confusion — both of which have a lot to do with the distorting effects of great wealth on our society.

Put it this way: If something like the financial crisis of 2008 had occurred in, say, 1971 — the year Richard Nixon declared that “I am now a Keynesian in economic policy” — Washington would probably have responded fairly effectively. There would have been a broad bipartisan consensus in favor of strong action, and there would also have been wide agreement about what kind of action was needed.

But that was then. Today, Washington is marked by a combination of bitter partisanship and intellectual confusion — and both are, I would argue, largely the result of extreme income inequality.