Largest AI Safety Protest in US History Draws Diverse Crowd

Organizers reflect on the emotional impact and future potential of the impactful demonstration.

Apr. 6, 2026 at 6:10am

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A recent AI safety protest in San Francisco's Dolores Park drew a crowd of over 150 people, making it the largest such demonstration in US history. The event featured speeches from experts like Berkeley professor Will Fithian, who spoke passionately about the need to slow down AI development for the sake of future generations. Organizer David Scott Krueger was inspired by the energy of the crowd, but also noted the challenge of mobilizing the millions of Americans concerned about the rapid pace of AI innovation.

Why it matters

As AI systems become more advanced and ubiquitous, there are growing concerns about the potential risks and unintended consequences. This protest represents a grassroots effort to raise awareness and pressure tech leaders to prioritize safety and ethics as the technology progresses. The large turnout signals that public anxiety about AI is widespread and that there is an appetite for more organized activism on this issue.

The details

The protest took place on a sunny Saturday afternoon in San Francisco's Dolores Park. In addition to the speeches, the event featured a whimsical spectacle of a man being "turned into a cake" by his friends. Krueger noted that while the march itself drew around 150 people, there were hundreds more in the park who could potentially be engaged in future demonstrations. The organizers, led by Michael Trazzi, were pleased with the media coverage and energy of the crowd, but acknowledged the challenge of translating that into a larger national movement.

  • The protest took place two weeks ago on a Saturday afternoon.
  • Krueger had previously only prepared speeches for the Canadian parliament and a high school event.

The players

Will Fithian

A Berkeley statistics professor who gave an emotional speech about the need to slow down AI development for the sake of future generations.

Michael Trazzi

The lead organizer of the protest march, which was the largest AI safety demonstration in US history.

David Scott Krueger

An attendee and speaker at the protest who reflected on the event's energy, impact, and future potential to engage more Americans concerned about AI risks.

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What they’re saying

“Confronting the reality that AI could kill us all, and yet people just keep cheerily building it, brings up a lot of emotions. They can be overwhelming.”

— David Scott Krueger, Attendee and Speaker

“It was heart-wrenching. Imagining telling his son years later about the grown-ups who came out to protest so that he (the son) would get a chance to grow up himself.”

— Will Fithian, Berkeley Statistics Professor

What’s next

Organizers are considering ways to build on the momentum from this protest and engage the millions of Americans who share concerns about the rapid pace of AI development. Strategies may include expanding outreach to "friends of friends of friends" and finding creative ways to draw larger crowds in public spaces like Dolores Park.

The takeaway

This protest demonstrates the growing public anxiety about AI risks and the potential for grassroots activism to raise awareness and pressure tech leaders. However, translating this energy into a larger national movement remains a significant challenge that the organizers are eager to address through innovative outreach and engagement tactics.