Does the American dream exist? Or has the middle class ruined it by hoarding opportunity on a scale that makes even the infamous one-percenters appear harmless and ineffectual? That’s the question economics professor and Brookings Institution fellow Richard Reeves has set out to answer, and his findings are worrying: the top echelons of the US middle class – those earning over $120,000 – are separating from the rest of the US, and pulling up the drawbridge behind them.