But the deeper problem for the Soviet Union wasn’t the oil price collapse; it’s what came before. In his book Collapse of an Empire, Russia’s great post-Soviet reformer Yegor Gaidar pointed out that during the long preceding oil boom, Soviet policymakers thought that they could walk on water and that the usual laws of economic gravity did not apply to them. Soviet policymakers didn’t bother developing a theory to make sense of their spending. They didn’t even bother paying attention to their results. The math seemed to work out, so they just assumed there was a good reason.

This is as true of the current Venezuelan leaders as it was of the Soviet leaders. The Venezuelan government, though it doesn’t claim to be full-fledged in its devotion to Marxism-Leninism, has been pursuing as absurd an economic policy mix as its Soviet predecessor. It has insisted for years on maintaining drastic price controls on a wide range of basic goods, including food staples such as meat and bread, for which it pays enormous subsidies. Nonetheless the Venezuelan government, like the Soviet Union’s, has always felt it could afford these subsidies because of its oil revenues.

But as the oil price has fallen by slightly more than half since mid-2014, oil incomes have fallen accordingly. And rather than increase oil production, the Venezuelan government has been forced to watch it decline because of its mismanagement of the dominant state-owned oil company, PDVSA.