Nearly 15 years after former C.I.A. operative Valerie Plame had her covert status leaked to the press by members of the George W. Bush administration, the outed spy has a new national security mission: saving the world from Donald Trump. She has been keeping busy in the years since she retired from the C.I.A. and moved, with her husband, former ambassador Joseph Wilson, from Washington to Sante Fe, writing spy thrillers and raising teenage twins. She turned one of her books, a memoir about the 2003 scandal that bears her name, into a movie starring Sean Penn and Naomi Watts. But it is her obsession with nuclear weapons that has inspired her most recent, and most quixotic, bout of activism.

This week, Plame, who works closely with counter-proliferation group Global Zero, announced a new crowd-funding campaign to buy a controlling stake in Twitter and force the company to ban Trump from the platform. “Time and again his use of this huge global platform has major consequences in the real world,” Plame writes on her GoFundMe page. “Trump has already brought us closer to nuclear war than any time since the Cuban Missile Crisis. We can’t take Trump’s nukes away (yet!), but we can take away his biggest megaphone and stop him from tweeting armageddon.”

The plan is ambitious, to say the least. Plame is seeking to raise $1 billion, in what would be the largest crowd-funding campaign of all time. Similar plans went nowhere when a group of shareholders petitioned Twitter to sell itself to its users earlier this year, nor when Mexican currency traders floated a bid to buy the company and immediately shut it down. Still, Plame is deadly serious about the idea—and thinks her activist investor strategy, as unrealistic as it is, is the best possible way to push Trump off the platform. (If she can’t buy a significant stake in the company, Plame says she’ll donate 100 percent of the money she raises to Global Zero.) Here, the ex-spy talks to the Hive about the limits of free speech, how she would use the $1 billion, and why threatening nuclear war should violate Twitter’s terms of service.

The Hive: How did you come up with this idea?

Valerie Plame: Well, John Oliver joked last week about how we never imagined that the invention of Twitter would lead us to the brink of nuclear Armageddon. A good chuckle, but the people who understand how crises escalate—I worked on counter-proliferation at the C.I.A.—we’re not laughing very hard. It is deadly serious. The threats he has posted with regard, most recently, to North Korea—”fire and fury,” this sort of casual use of this platform—is appalling. And I’m seriously afraid that we will stumble into a nuclear war with North Korea.

I’ve been working with Global Zero. They are a great organization leading the resistance against nuclear war and the elimination of nuclear weapons. And we came up with the idea of, “Wait, we can do a GoFundMe site and try to buy a controlling interest in Twitter.” Because their rules do say that they do not allow violence. And nuclear war, I think, falls into the rubric of violence.

Raising $1 billion would give you an 8 percent stake in Twitter, at its current valuation. That’s a bigger position than many activist investors take before seeking changes at a company. What’s the end goal?

It’s a very ambitious goal. I recognize that. One billion dollars is a whole bunch of money. But the real hope in launching the campaign is to shine a spotlight on how dangerous Trump’s use of Twitter really is. We don’t have to sit by while Trump uses his enormous global platform to undermine our national security. We would love to be able to actually force Twitter’s hand to live up to its rules, explicitly forbidding hate speech and encouraging violence.