Technology continues to unlock new ways for Americans to live and work. To illustrate these changes, this broadside explores the promise of online platforms such as Uber and Airbnb. Unfortunately, instead of embracing innovation, many cities insist on applying antiquated regulations or completely banning these new services to protect special interests-at the expense of workers and consumers.These fights go far beyond the sharing economy. To promote the benefits of new technology, it is time for states to step up and overrule cities when local policies threaten innovation. If cities are going to remain a driving force for economic progress, then states need to save so-called progressive cities from themselves.