The Tongue Is a Fire: Speech and the Human Animal

Human beings are strange creatures when it comes to speech. We simultaneously crave the freedom to express ourselves and the power to silence those who express ideas that threaten us. This is not a contradiction – it is a feature of how human minds work, and understanding it is essential to understanding why the free speech debate is so intractable and why it will never be permanently resolved.

The desire for free expression is rooted in our deepest psychology. From the earliest age, children assert their autonomy through speech – saying “no,” asking “why,” demanding to be heard. The suppression of speech is experienced, at a neurological level, as a threat to the self. Functional MRI studies have shown that being told you cannot express your views activates the same brain regions associated with physical pain and social rejection. Being silenced is not merely frustrating – it is, in a very real neurological sense, painful. This is why people across the political spectrum react so viscerally to perceived censorship, and why the feeling of being silenced is among the most politically radicalizing experiences a person can have. When people say “they are trying to shut us up,” they are not merely making a political claim. They are describing an experience that feels like an assault on their very identity.

But we also carry a deep and ancient instinct to suppress speech that threatens the group. For most of human history, we lived in small, tightly bonded communities in which social cohesion was essential for survival. Ideas that challenged shared beliefs, norms, and hierarchies were genuinely dangerous – not because they were false, but because the disruption they caused could fracture the group and leave its members vulnerable. The instinct to suppress dangerous speech is not irrational; it is a survival mechanism honed over hundreds of thousands of years. The problem is that this instinct evolved for bands of hunter-gatherers and now operates in societies of hundreds of millions, where the definition of “the group” is contested and the threshold for “dangerous speech” is wildly variable. We are cavemen with smartphones, trying to manage an information environment our brains were never designed to inhabit.

The psychology of offense is more complex than either side acknowledges. Conservative critics of “snowflake culture” dismiss emotional reactions to speech as weakness; progressive advocates of speech restrictions sometimes treat every report of harm as conclusive evidence for restriction. The reality is subtler. When a person of color hears a racial slur, the physiological response is real and measurable – elevated cortisol, increased heart rate, activation of the amygdala. When a conservative Christian hears their faith described as bigotry, the response is similarly real. These are not signs of weakness; they are normal human responses to perceived threats. But the fact that speech causes an emotional response does not, by itself, establish that the speech should be restricted, any more than the fact that a breakup causes pain establishes that breakups should be illegal. The question is always whether the harm is severe enough, concrete enough, and avoidable enough to justify the costs of restriction – and that question cannot be answered by neuroscience alone.

The brain’s threat-detection systems compound the difficulty. They evolved to err on the side of caution – to treat ambiguous stimuli as dangerous rather than risk underreacting. A person can feel genuinely threatened by speech that poses no physical risk. The feeling is real, but the danger may not be. Any framework that relies on subjective feelings of safety as the primary criterion will be both over-inclusive – restricting speech that causes discomfort but not harm – and under-inclusive – failing to address speech that causes real harm but does not trigger the “right” emotional responses.

And yet the genuine harm of dehumanizing speech is not in dispute among serious scholars. Here is the darkest thread in the history of words: the genocides of the twentieth century – the Holocaust, Rwanda, Cambodia – were all preceded and accompanied by sustained campaigns of dehumanizing speech. The Nazis did not begin by building gas chambers; they began by calling Jews “vermin” and “parasites.” The Hutu extremists used Radio Mille Collines to broadcast propaganda calling Tutsis “cockroaches” and explicitly instructing listeners to kill them. Words can and do kill – not directly, not immediately, but through the slow process of normalizing dehumanization until violence against the dehumanized group becomes thinkable, then acceptable, then inevitable. The breezy dismissal of hate speech as “just words” is historically illiterate.

And yet – and this is the agonizing paradox at the heart of everything – the suppression of speech is also a precursor to every form of authoritarianism. Every dictator, every totalitarian regime, every authoritarian movement in history has begun by controlling speech. Hitler did not merely use speech as a weapon; he suppressed the speech of his opponents. Stalin, Mao, Pol Pot – all maintained power through comprehensive control of expression. “Unrestricted speech can lead to genocide” and “restricted speech enables authoritarianism” are both true, and neither truth invalidates the other. Both sides of the debate are pointing to real historical patterns. Both are drawing legitimate lessons. The lessons simply point in opposite directions. This is why anyone who claims to have a simple answer is either not thinking hard enough or not being honest.

Karl Popper’s “paradox of tolerance” – that unlimited tolerance of the intolerant leads to the destruction of tolerance – is often invoked, usually by those favoring restriction. The insight is genuine. But Popper himself argued the intolerant should be suppressed only when they abandon persuasion for coercion – “fists or pistols.” The paradox is real, but it is not a blank check for suppressing any speech someone labels “intolerant.” The question is always: who decides, and what safeguards exist against abuse?

Perhaps the most psychologically revealing feature of the debate is that people on every side genuinely believe they are the ones being silenced. Progressives see wealth, corporate media, and institutional inertia amplifying conservative voices while marginalizing progressive ones. Conservatives see universities, mainstream media, entertainment, and technology companies amplifying progressive voices while marginalizing conservative ones. And both are, in significant measure, correct. The American information ecosystem is not monolithic; it is a complex patchwork of institutions and platforms, some amplifying the left and some the right. A conservative professor at a progressive university and a progressive activist in a conservative rural community are both experiencing genuine suppression. They are simply experiencing different systems. The mistake both sides make is assuming their own experience is the whole picture and that the other side is either lying or does not deserve sympathy.

This mutual perception of victimhood is not, as cynics might suggest, entirely bad faith. It is the natural consequence of the fact that “free speech” is not a single unified value but a complex system with many moving parts, and different people are affected by different parts. The conservative shadow-banned on social media and the progressive targeted by an online harassment campaign are both experiencing real restrictions, and both are right to be angry. A more honest account would acknowledge that the free speech landscape is vast and varied, that genuine threats exist on multiple fronts, and that the experience of being silenced – wherever it occurs and whoever experiences it – is painful, politically radicalizing, and corrosive to democratic life. That shared pain, if we could ever bring ourselves to recognize it in each other, might be the beginning of something other than war.