The argument rests on a fundamental rethinking of how knowledge moves between research, governance, and the public. Traditional models of science–policy interaction assumed a linear pipeline: researchers produce facts, experts distill them into advice, and decision-makers apply that advice to problems. In this view, controversy represents contamination—value-laden disputes intruding on value-free facts. Yet decades of research in science and technology studies have demonstrated that the linear model rarely describes how policy actually works. Food systems are what scholars call wicked problems: they involve multiple legitimate perspectives, deep uncertainty, contested values, and tightly coupled social, ecological, and economic dimensions. No amount of data alone can settle questions such as how much land should be devoted to livestock farming or whether gene-edited crops should fall under the same regulations as transgenic organisms. These questions demand deliberation, and deliberation is inherently contested.

Seen through this lens, controversy is not noise obscuring the scientific signal; it is a signal in its own right. Controversies reveal where public concerns genuinely lie, where evidence is thin or contested, where institutions have lost trust, and where policy frameworks have failed to keep pace with technological or social change. When scientists and scientific advisory bodies retreat from controversy, they leave a vacuum that is quickly filled by less rigorous voices: industry lobbying campaigns, activist absolutism, conspiracy theories, and misinformation. The withdrawal of credible expertise from contested terrain does not depoliticize the debate; it simply removes the most careful participants from it. Conversely, when scientists enter controversies with humility about uncertainty and openness about values, they can elevate the quality of the entire conversation.

Concrete examples abound across the food domain. The prolonged European disputes over glyphosate herbicides, for instance, initially saw scientific assessment agencies produce technically sound but socially tone-deaf evaluations, triggering accusations of capture and conspiracy that eroded trust in regulatory science. Subsequent rounds of assessment placed far greater emphasis on transparency, on independent scrutiny of industry data, and on direct public engagement—an approach widely credited with partially restoring legitimacy even among skeptics. Similarly, debates over Golden Rice and other biofortified crops demonstrated that resistance was often rooted not in ignorance of the science but in legitimate concerns about corporate control of seed systems and the adequacy of technological fixes for problems of poverty and distribution. Researchers and institutions that acknowledged these concerns, rather than dismissing opponents as anti-science, found more productive pathways toward deployment and policy acceptance.

The mechanisms by which engagement strengthens science–policy–society interfaces are increasingly well understood. First, controversy forces articulation. When researchers must defend and explain their findings to skeptical publics, they are compelled to clarify assumptions, expose uncertainties, and distinguish firmly established results from contested interpretations. This process frequently improves the science itself, identifying blind spots and untested assumptions that would otherwise remain hidden. Second, controversy builds trust through visibility. Public trust in science is less a product of deference to authority than of demonstrated reliability, openness, and responsiveness. Scientists who engage critics directly, admit errors when they occur, and update positions as evidence evolves signal these qualities far more effectively than institutions that communicate only through polished consensus documents.

Third, engagement surfaces the value questions that linear models suppress. Questions about food are never purely technical. Whether a society should prioritize yields, environmental resilience, animal welfare, rural livelihoods, or consumer choice is a matter of values, and pretending otherwise breeds cynicism. Structured engagement with controversy allows these values to be named and negotiated explicitly, in formats such as citizen assemblies, deliberative mapping exercises, participatory technology assessment, and multi-stakeholder platforms. In several countries, such deliberative processes have reshaped national food strategies, demonstrating that citizens can grapple responsibly with complexity when given genuine influence and adequate information. Science contributes the evidence base; deliberation weighs the trade-offs; policy reflects the negotiated outcome. Each element is stronger because the others are present.

None of this implies that engagement is easy or risk-free. Scientists who enter contested arenas face harassment, organized campaigns against their reputations, and the temptation to overstate certainty in defense of their position. Institutional incentives, including funding structures and publication metrics, rarely reward time spent on policy engagement or public deliberation. Early-career researchers in particular may fear professional consequences for taking public positions, however carefully qualified. Moreover, engagement can be weaponized: bad-faith actors may exploit scientists’ willingness to debate to manufacture false balance or to launder fringe claims with borrowed credibility. These risks are real, and ignoring them would itself be a failure of rigor.

The response, however, is not withdrawal but strategic and institutionalized engagement. That means equipping researchers with training in communication, negotiation, and the sociology of controversy; providing legal and institutional protection for scientists who face retaliation; building dedicated boundary organizations and knowledge broker roles that mediate between research, policy, and publics; and designing advisory processes that are transparent about whose interests are represented and how value judgments enter assessments. It also means diversifying who speaks for science. Controversies over food disproportionately affect farmers, Indigenous communities, low-income consumers, and food workers, yet these groups are chronically underrepresented in expert panels. Interfaces that incorporate this diversity are not just more legitimate; they are epistemically richer, drawing on experiential and local knowledge that formal science often misses, from farmers’ tacit understanding of soil and weather to community knowledge of food access barriers.

The scholarly case for embracing controversy also carries implications for how scientific institutions measure success. If the goal of science–policy–society interfaces is not merely the transfer of information but the cultivation of shared understanding and durable decisions, then indicators such as citation counts or the volume of policy briefs produced are poor measures of effectiveness. More meaningful metrics include the extent to which advisory processes are trusted by contested stakeholders, whether deliberative outputs actually influence legislation, how controversies evolve over successive episodes, and whether previously polarized positions converge toward workable compromises. Longitudinal studies of food governance suggest that interfaces built on engagement and deliberation are more resilient across political cycles than those built on technocratic authority, which tend to collapse whenever political power shifts against them.

Ultimately, the argument reframes one of the oldest tensions in the relationship between science and society. Food system controversies are not temporary disruptions on the road to a settled consensus; they are permanent features of democratic governance over matters that touch everyone, three times a day. A science system that treats them as threats will retreat into irrelevance, ceding the terrain to those least equipped to navigate complexity. A science system that treats them as opportunities—moments to clarify, to listen, to deliberate, and to rebuild trust—can transform conflict into a generative force for better policy and a more food-secure, sustainable, and equitable world. The evidence increasingly suggests that the second path is not merely more virtuous but more effective, and that the future of evidence-informed food governance depends on scientists willing to meet controversy where it lives: in the public square.

Subject of Research: The role of scientists' engagement in food system controversies in strengthening science–policy–society interfaces

Article Title: Engagement in food system-related controversies can strengthen science–policy–society interfaces

Article References: Engagement in food system-related controversies can strengthen science–policy–society interfaces. (n.d.). https://doi.org/10.1038/s43016-026-01416-y

Image Credits: AI Generated

DOI: 10.1038/s43016-026-01416-y

Keywords: food systems, science policy, controversies, public engagement, deliberation, trust in science, evidence-based policy, food governance, wicked problems, science communication, stakeholder participation, sustainability