Thank Carter-era deregulation for that. In 1979 the nation was known for bland, uniform and mass-produced beer, and there were but a mere 44 breweries in the entire country, most of their products very like each other. But legal restrictions were lifted. “Three decades later, the U.S. boasts 1,463 breweries, including 975 brewpubs”, and a culture of beer connoisseurship with few if any equals around the world.
And all just from repealing some unnecessary laws. It’s kind of like running the CPSIA tape in reverse.