The environmentalist left is always eager to talk about the fragility of natural ecosystems. Even slight alterations, they argue, can have huge ripple effects and unintended consequences. Thus, we’re forced to suffer through mosquito bites every summer instead of eradicating that godless species as we should have years ago. Still, the point about the interconnected nature of natural systems is not without merit, and there is such system that is routinely disrupted without adequate regard for the consequences. That system is the economy.