The struggle between capitalism and socialism is back. “America will never be a socialist country,” President Trump tells us, even as Senator Bernie Sanders and Representative Alexandria Ocasio-Cortez champion democratic socialism. At the same time, a consensus is growing — from Ray Dalio, the billionaire hedge fund manager, to Joseph Stiglitz, the economist and Nobel winner — that capitalism needs major reforms if it is going to survive. Perhaps surprisingly, given the trend toward the privatization of public services over the last generation, American history offers a way forward: the public option.

Most Americans probably associate the idea of a public option with health care. When the Affordable Care Act was debated in 2010, proponents of a public option wanted anyone to be able to buy into a government health insurance option like Medicare that would compete with private health insurance plans. But the public option isn’t a recent policy innovation, it isn’t limited to health care and, historically speaking, it hasn’t even been particularly controversial as an approach to public policy.

Americans love public options and have relied on them for hundreds of years. We just don’t usually think of them with that label. A public swimming pool is a public option; many people have private swimming pools. A public library is a public option; many universities have private libraries. Public parks, public schools, public defenders in courtrooms — the list goes on. They are all public options, government provisions of goods and services that coexist with the private marketplace.

Throughout our history, Americans have turned to public options as a way to promote equal opportunity and reconcile markets with democracy. For example, public libraries allow anyone to read, check out books or surf the internet. This expands educational opportunities and guarantees access to information to everyone, but it doesn’t prevent people from buying books at the bookstore if they choose.