A Roman-era marble bust of Greek philosopher Aristotle. "Ethics forms the core of economics," Sedlacek argues. "It leads straight to the question of the good and right way of living, or Aristotle's concept of eudemonia. For him, maximizing benefit without maximizing good would have been pointless. A market economy without morality is a zombie system: The robots function perfectly, but in the end they leave behind a trail of devastation. We have to return to our origins and talk about the soul of the economy."