Laziness is efficiency. People drive because they are lazy and driving is the most efficient use of their resources. People also walk because they are lazy and walking is the best use of their resources. Driving is so prevalent because 1) we don’t incorporate the full cost (social, environmental, etc.) into driving, 2) driving is often the locally (individually) most efficient choice while being globally (socially) the suboptimal. We should engineer and environment where the globally optimal choice is the lazy choice.