Henry Ford learned mass production from slaughterhouses. A century later, our modern economy still resembles a meatpacking plant.

The assembly line, the foundation of modern capitalism, came from perfecting methods to slice up animals while—and this is the important part—preventing them from resisting. And once capitalists figured out how to turn animals into component parts (just a leg, just a throat, just a head), they realized they could do the same thing to human workers (just a hand, just an arm, just a cutting motion). Ideas of how to prevent human resistance came from first figuring out how to prevent animal resistance.