Economics is an artifact of human imagination, and the agreement among certain humans who "play the games" together -- thereby it is a social technology. There is no underlying physical reality other than what is identified by the players to be components. Granted, the interactions within the system may be complex, and the economic properties are determined by what people study. Nevertheless, in the economic properties are determined by and limited only by the beliefs of the "players." To build economic models one must assume certain features, and the models become part of the generators of the results. Since they are not inherently tied to the physical and biological realities, they may fail arbitrarily as the physical and biological world view of humans change -- or as people believe the physical and biological world exists. Economics in large part reflects human belief systems. When physical and biological constraints become seriously constrained for humans, economics becomes irrelevant. The game ends.
