The computers we have today are not bicycles. Instead we’ve got something more like a car for the mind. Which, you know, does get you around and is easier and more comfortable than a bike. But at what cost? When we decided that America would be a place for cars, we signed ourselves up for urban sprawl, air pollution, car crashes, and oil wars. And even on a human scale, cars are as much liabilities as they are assets — I’m sure we’ve all known people working terrible jobs to keep their junker running so they can get to their terrible job.