The standard defence of gain-of-function research runs something like this: nature is already churning out dangerous pathogens, so scientists must deliberately engineer more dangerous versions in the lab to understand their weaknesses and prepare defences, just in case one emerges naturally or, heaven forbid, leaks from the very laboratory where it was created. The argument is tidy, reassuring, and profoundly wrong. It rests on circular logic, breathtaking hubris, and a refusal to confront the most obvious risk: the monsters they create are far more likely to escape the lab than to appear spontaneously in the wild.
Nature has been generating viruses for billions of years. It does not require human assistance to produce lethal strains. The 1918 influenza, the original SARS, MERS, Ebola, and countless other threats emerged without any laboratory assistance. When researchers deliberately manipulate a virus, inserting mutations that increase transmissibility, virulence, or host range, they are not merely studying an existing threat. They are manufacturing a novel pathogen that did not previously exist in nature. That creation carries an inherent risk that no amount of "study" can fully neutralise.
The circularity is glaring. Proponents claim we must create enhanced pathogens to learn how to stop them. Yet the act of creation itself generates the very danger we are supposedly preparing to meet. It is the equivalent of arguing that we should build more powerful nuclear weapons so we can study how to disarm them, while accepting that an accidental detonation in the weapons lab is an acceptable research cost. The premise collapses under its own weight: the safest way to avoid a lab-created pandemic is not to create the pandemic agent in the first place.
Real-world evidence of lab leaks makes the risk impossible to dismiss as theoretical. Documented escapes of SARS, smallpox, and other high-consequence pathogens have occurred repeatedly, even in high-containment facilities. The probability is not zero; it is a recurring feature of this type of research. Once an engineered virus exists in a laboratory, it can be stolen, accidentally released, or even deliberately misused by insiders. The "escape from the lab" scenario is not a remote hypothetical; it is the most probable route by which an enhanced pathogen would ever enter the human population.
The claim that we must do this work "just in case nature creates it" also ignores a crucial asymmetry. Natural evolution operates under constraints of fitness and transmission that laboratory manipulation can bypass. By forcing a virus through unnatural selection pressures or direct genetic editing, researchers can create combinations that would be extraordinarily unlikely, or perhaps impossible, to arise in the wild. The resulting organism is not a preview of nature's next move; it is a new threat invented by humans. Defending against it then requires studying our own creation, not nature's.
Safer alternatives exist and have been underfunded for decades. Metagenomic surveillance of wildlife and livestock can detect emerging threats in their natural habitats without bringing them into high-containment labs for enhancement. Broad-spectrum antivirals, monoclonal antibody platforms, and rapid-response vaccine technologies can be developed against whole classes of viruses rather than single engineered strains. International agreements that restrict the most dangerous categories of pathogen manipulation, similar to treaties limiting certain chemical and biological weapons research, would reduce the global risk pool without sacrificing genuine defensive science.
The deeper problem is cultural and institutional. Gain-of-function work has been defended by powerful scientific and funding networks that benefit from its continuation. The same institutions that once dismissed the lab-leak hypothesis for SARS-CoV-2 as conspiracy, have a clear interest in preserving the research that makes such leaks possible. When the people conducting the work also control the narrative about its safety, independent scrutiny becomes essential.
Mencken observed that practical politics often consists of keeping the populace alarmed by imaginary hobgoblins. Gain-of-function research supplies a scientific variant of the same tactic: we must be terrified of nature's monsters so that we accept the creation of even more dangerous ones in the name of protection. The logic is self-serving and self-perpetuating. It treats existential risk as an acceptable research externality and assumes human institutions are infallible at containing what they deliberately enhance.
The honest position is precautionary. We do not need to create novel pathogens to study how to stop them. We need robust surveillance of what already exists, better general-purpose medical countermeasures, and strict limits on experiments that could produce new, high-consequence agents. The argument that we must play God with viruses to defend against God's viruses is not prudence: it is the most dangerous kind of intellectual arrogance. The monsters we manufacture in laboratories are not hypothetical future threats. They are present dangers created by human hands, and the first line of defence against them is to stop creating them.