It finally looks as if Big Tech may face some breakups. Lawmakers are interrogating tech C.E.O.s on Capitol Hill while the Justice Department pursues a landmark antitrust case against Google. For decades, tech giants have avoided such scrutiny — hiding behind the idea that their products are free, beneficial, even beloved.

Lina Khan says this is no excuse for a monopoly.

As a 28-year-old law student, Ms. Khan published a single scholarly article that greatly shifted America’s antitrust debate. Three years later, she remains an existential threat to companies like Amazon, Facebook, Google and Apple.

Ms. Khan served as counsel to the House Judiciary antitrust subcommittee in this summer’s investigation, helping expose how Silicon Valley’s most revered companies use data and power to undercut, threaten and swallow up their competition.

In this episode of “Sway,” she tells Kara Swisher that Big Tech’s practices have had a “chilling effect” on the American economy, and that it’s time to drag the nation’s antitrust thinking out of the “ice age.”