Decades ago, when Big Tech first offered its services, it promised that it was creating a digital community square where the public was welcome to participate in public discourse. And in the beginning, this was certainly true. Then millions of Americans created Twitter, Facebook and YouTube accounts.

Families often used these social media accounts to keep distant relatives and friends informed, and others used them to set up digital clubs to discuss topics of mutual interest. Still more regularly used the platforms to engage in robust debate about the important issues of the day.

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