Capitalism is not real; it is an idea. America is not real; it is an idea that someone had ages ago. Britain, Christianity, Islam, karate, Wednesdays are all just ideas that we choose to believe in and very nice ideas they are, too, when they serve a purpose. These concepts, though, cannot be served to the detriment of actual reality.
The reality is we have a spherical ecosystem, suspended in, as far as we know, infinite space upon which there are billions of carbon-based life forms, of which we presume ourselves to be the most important, and a limited amount of resources.
