Economist Tyler Cowen is concerned that our economy is changing in ways that encourage a reduction in personal ownership of physical objects, the “stuff” of our lives. He points particularly to the Internet and software that have allowed us to move away from ownership of reading materials. Similarly, we stream movies and TV shows rather than buying DVDs. Especially among young people, car ownership seems less important than in the past and is now replaced for many by Uber, Lyft, mass transit, and so on. As we move further toward the Internet of Things, he argues, most of the value inside our homes will reside in the companies and government that control the software that manages our homes for us. Why might capitalism be threatened by Americans declining ownership of its “stuff?”