Think of our great-great-grandparents, just over a century ago, who did not have access to planes or automobiles or most of the drugs and health care we now take for granted, not to mention indoor plumbing, air-conditioning, shopping malls, radio, or motion pictures; let alone information technology, robotics, or computer-controlled machinery. And going back a few more generations, the technological know-how and living standards were even more backward, so much so that we would find it hard to imagine how most people struggled through life. These improvements follow from science and from entrepreneurs such as Thomas Edison, who applied science to create profitable businesses. This process of innovation is made possible by economic institutions that encourage private property,
