Consider this thought experiment.
You have been transported back to 1912 and have the power to change the course of history. You foresee a century ravaged by the effects of two catastrophic World Wars, with a resulting 100m casualties. You also know the effects of violent communist revolution and rule, with a death toll almost matching the global conflicts.
But you have the power to prevent all this, on one condition: in your new history, each major country sustained higher levels of recorded economic inequality. Growth through the century would ensure average living standards rose, but the larger economic pie would be distributed more unequally than today.



Would you change history? Most rational people would surely opt to prevent bloody suffering. I suspect even Jeremyn Corbyn would. That the most ardent egalitarians would do so shows us that sometimes an aim (in this case “a more equal society”) comes at too high a cost.
This is important. For a new comprehensive and compelling account of the history of inequality by Walter Scheidel suggests that the only means of substantially levelling economic outcomes have been mass mobilisation war, violent revolution, pandemics (think bubonic plagues) and state failure.