The polar bear video has millions of views. Set to a haunting piano score that's become ubiquitous on TikTok, it shows a lone bear swimming between increasingly distant ice floes. The comments section overflows with teenage grief, rage, and helplessness.

Beside my laptop screen lies the latest Intergovernmental Panel on Climate Change (IPCC) report. Same subject, different universe. The measured language of climate science stands in stark contrast to the raw emotions evoked by that TikTok. Both contain some truth, but also fundamentally different frequencies of human understanding.

Gen Z, the first generation to spend their earliest years in the smartphone era, has developed a fundamentally different relationship with truth.

Starting in 2010, researchers across multiple countries began documenting a sharp rise in adolescent anxiety, depression, loneliness, self-harm, and social withdrawal. Large-scale survey data from the United States, the United Kingdom, Canada, Australia, and Europe showed similar trend lines emerging between 2012 and 2014. The timing aligned almost exactly with the moment smartphones, front-facing cameras, and algorithmically driven content platforms became the dominant hubs of adolescent social life.

Studies using data from the Centers for Disease Control and Prevention's long-running Youth Risk Behavior Survey, the University of Michigan's Monitoring the Future study, and parallel international mental health datasets found steep increases among teenage girls in depressive symptoms, sleep disruption, and feelings of persistent sadness and hopelessness. Researchers also documented declines in face-to-face social interaction alongside dramatic increases in time spent interacting online.

But the deeper transformation was not simply psychological. It was cultural and cognitive. As social life migrated onto platforms optimized for engagement, visibility, and emotional reaction, questions of truth increasingly became filtered through identity, emotion, and social validation rather than through slower institutional systems of evidence, authority, and debate. Beyond changing what young people consumed, social media also altered how they processed reality. That shift, from shared public truth toward personalized and algorithmically reinforced truth, sits at the center of truth’s future.

“Our realities,” says Emma Lembke, “are being shaped by a profit-driven attention economy that prioritizes engagement over well-being.” Lembke is the director of Gen Z Advocacy at the Sustainable Media Center, a nonprofit I direct that brings together an intergenerational board to protect kids from the harms of social media. She has spent years organizing young people around these issues, tracking platform behavior, and building coalitions between researchers, attorneys, and youth advocates. For her, this isn’t an abstract threat. It’s her generation’s everyday life.

The danger is no longer just misinformation. Thanks to AI, it’s now possible to manufacture fake realities at scale. Deepfake videos, cloned voices, and bogus news stories are dissolving the line between what’s real and what’s not faster than society can adapt.

Fully AI-generated personas, with faces, voices, backstories, and millions of followers are already operating across Instagram and TikTok, indistinguishable from human influencers. Gen Z didn't create this problem. They inherited it. And they're navigating it without a map, inside feeds that have no obligation to tell them what's real. For Gen Z, whose understanding of the world is already filtered through algorithmic feeds, reality itself often arrives pre-curated, emotionally optimized, and computationally amplified.

New York University professor and media critic Scott Galloway has been blunt about the way AI and algorithmic platforms are reshaping truth for Gen Z. He argues that AI-powered platforms like Facebook and TikTok aren’t just social networks. They have become influence engines capable of shaping what millions of young people see, believe, fear, and ultimately accept as real.

Central to Galloway’s critique is the idea that engagement has replaced human judgment as the organizing principle of information online. Platforms are optimized not for accuracy, empathy, or discussion but for attention and emotional reaction. "They aren't crawling the real world; they aren’t crawling what’s best about us," he said during a panel with Lembke at the Sustainable Media Center. "They're crawling the comments section."

That tension between emotional experience and factual truth is particularly visible around climate change. Climate activist Xiye Bastida, one of the most visible Gen Z voices in the global climate movement, has argued that social media allows younger users to experience climate change through human stories and firsthand accounts, creating an emotional understanding of the crisis that feels very different from reading scientific reports alone.

In 2023, researchers at Google published a study examining how Gen Z navigates online information. Participants, they found, tend to encounter information passively through social media feeds rather than actively seeking it out, and their engagement is deeply social, shaped by collaborative interpretation and discussion within peer groups. The study called this practice “information sensibility,” a socially informed awareness of how to judge the value and credibility of what they see online.

Participants described reacting emotionally first, discussing stories with peers second, and verifying details later, if at all. What looks like credulity from the outside is something more sophisticated from the inside. Gen Z has developed a distributed verification system, not institutional, not algorithmic, but social. Peer networks function as real-time editorial boards, stress-testing information against lived experience before it gets accepted or rejected. This has real implications for how we think about media literacy. The old model—teach kids to slow down, verify sources, check credentials—was designed for a different time. It assumed individuals made deliberate choices about what to believe. Gen Z's information sensibility is collective and continuous. You don't fix that with a checklist. You have to reckon with the environment that produced it.

Participants described learning about social issues not through direct research but through emotionally charged posts that sparked frustration, urgency, or hope. These emotional moments became cues to look deeper, talk with friends, or seek supporting evidence. In this way, Gen Z doesn’t just consume facts. They socially and emotionally negotiate truth in the moment.

The distinction matters because social media collapses journalism, entertainment, activism, advertising, and personal confession into the same visual and emotional language. A climate report, a meme, a war video, a conspiracy theory, and a personal trauma story can appear seconds apart, all competing equally for attention and belief.

Which brings us back to the polar bear.

When it comes to issues like climate change, young people are often forced to process the scientific reality of the crisis alongside the emotional weight of inheriting it. “The planet is suffering, and we don't have the luxury of time anymore,” Bastida said in her 2020 TED Talk. “I truly feel that if all of us took care of the Earth as a practice, as a culture, none of us would have to be full-time climate activists.”

Perhaps the way forward isn't choosing between emotional and factual truth, but learning from how Gen Z integrates them. Gen Z often treats emotional experience not as a replacement for evidence but as a signal that something deserves attention, investigation, and action.

The implications go far beyond attention spans or mental health. The generation currently entering adulthood grew up in a world where intensity increasingly determines visibility. News, entertainment, outrage, advertising, activism, and propaganda all show up in the same endless feed, bolstered not by their trustworthiness or civic value, but by engagement. Virality increasingly functions as a proxy for credibility.

This shifting relationship with truth extends into how Gen Z approaches public life. Rather than becoming less engaged, they're forging paths for collective action that move easily between digital spaces and real-world activism, between emotional testimony and empirical evidence. The student climate movement Fridays for Future didn't begin with a policy brief. It began with a teenager sitting alone outside the Swedish parliament with a handmade sign. What spread it wasn't institutional endorsement. It was emotional resonance, peer sharing, and millions of young people saying simultaneously: This is real, this matters, we are not waiting. That is Gen Z's epistemology at work. Feeling first. Verification through solidarity. Action as argument.

Previous generations inherited relatively stable systems for determining what was real: newspapers, universities, scientific institutions, courts, and professional journalism. Those systems were imperfect and often exclusionary, but they provided shared reference points. Gen Z has inherited something fundamentally different: an information ecosystem where truth is increasingly shaped socially, emotionally, algorithmically, and now synthetically through AI.

As journalist Maria Ressa warned in her Nobel Prize acceptance speech, "Without facts, you can't have truth. Without truth, you can't have trust. Without trust, we have no shared reality, no democracy."

But Gen Z may already be building something to replace what's been lost. Not institutions. Not gatekeepers. A distributed, socially negotiated sense of who earns the right to be believed. They're not abandoning truth. They're auditing who gets to deliver it.

That verdict, built by millions of young people navigating this system together, is already in.

Excerpted from The Future of Truth: How AI Reshapes Reality. Copyright © 2026 by Steven Rosenbaum. Reprinted with permission from Matt Holt Books, an imprint of BenBella Books, Inc. All rights reserved.