Yes, but autarky depend upon whether the economy has all of the necessary inputs to all of the various goods at every order of production. Does any complex economy have all of the various inputs within itself to attain autarky? This is one thing I seriously doubt. I don’t think we can become autarkic any more than China can become autarkic and trying to prove that we can get along without exchange of goods, some of which one or the other has a monopoly grasp on is folly.