Many people sense that the United States is undergoing an epistemic crisis, a breakdown in the country’s collective capacity to agree on basic facts, distinguish truth from falsehood, and adhere to norms of rational debate.
This crisis encompasses many things: rampant political lies; misinformation; and conspiracy theories; widespread beliefs in demonstrable falsehoods (“misperceptions”); intense polarization in preferred information sources; and collapsing trust in institutions meant to uphold basic standards of truth and evidence (such as science, universities, professional journalism, and public health agencies).
According to survey data, over 60% of Republicans believe Joe Biden’s presidency was illegitimate. 20% of Americans think vaccines are more dangerous than the diseases they prevent, and 36% think the specific risks of COVID-19 vaccines outweigh their benefits. Only 31% of Americans have at least a “fair amount” of confidence in mainstream media, while a record-high 36% have no trust at all.
What is driving these problems? One influential narrative blames social media platforms like Facebook, Twitter (now X), and YouTube. In the most extreme form of this narrative, such platforms are depicted as technological wrecking balls responsible for shattering the norms and institutions that kept citizens tethered to a shared reality, creating an informational Wild West dominated by viral falsehoods, bias-confirming echo chambers, and know-nothing punditry.
The timing is certainly suspicious. Facebook launched in 2004, YouTube in 2005, and Twitter in 2006. As they and other platforms acquired hundreds of millions of users over the next decade, the health of American democracy and its public sphere deteriorated. By 2016, when Donald Trump was first elected president, many experts were writing about a new “post-truth” or “misinformation” age.
Moreover, the fundamental architecture of social media platforms seems hostile to rational discourse. Algorithms that recommend content prioritize engagement over accuracy. This can amplify sensational and polarizing material or bias-confirming content, which can drag users into filter bubbles. Meanwhile, the absence of traditional gatekeepers means that influencers with no expertise or ethical scruples can reach vast audiences.
The dangerous consequences of these problems seem obvious to many casual observers of social media. And some scientific research corroborates this widespread impression. For example, a systematic review of nearly five hundred studies finds suggestive evidence for a link between digital media use and declining political trust, increasing populism, and growing polarization. Evidence also consistently shows an association between social media use and beliefs in conspiracy theories and misinformation.
But there are compelling reasons to be skeptical that social media is a leading cause of America’s epistemic challenges. The “wrecking ball” narrative exaggerates the novelty of these challenges, overstates social media’s responsibility for them, and overlooks deeper political and institutional problems that are reflected on social media, not created by it.
The platforms are not harmless. They may accelerate worrying trends, amplify fringe voices, and facilitate radicalization. However, the current balance of evidence suggests that the most consequential drivers of America’s large-scale epistemic challenges run much deeper than algorithms.