There is, however, a flip side to the market’s power: it only values what is priced and only delivers to those who can pay. Like fire, it is extremely efficient at what it does, but dangerous if it gets out of control. When the market is unconstrained, it degrades the living world by over-stressing Earth’s sources and sinks. It also fails to deliver essential public goods—from education and vaccines to roads and railways—on which its own success deeply depends.