John Michael Greer wrote:Let’s begin with the big picture. In any human society, whether it’s a tribe of hunter-gatherers, an industrial nation-state, or anything else, people apply energy to raw materials to produce goods and services; this is what we mean by the word “economy.” The goods and services that any economy can produce are strictly limited by the energy sources and raw materials that it can access.
A principle that ecologists call Liebig’s law of the minimum is relevant here: the amount of anything that a given species or ecosystem can produce in a given place and time is limited by whichever resource is in shortest supply. Most people get that when thinking about the nonhuman world; it makes sense that plants can’t use extra sunlight to make up for a shortage of water, and that you can’t treat soil deficient in phosphates by adding extra nitrates. It’s when you apply this same logic to human societies that the mental gears jam up, because we’ve been told so often that one resource can always be substituted for another that most people believe it without a second thought
The End of Employment