should we adopt veganism on a global level for production and distribution? In the first round give your strongest arguments pre-empting counter responses, do not assume everything else has to stay the same. In the second round I want you to take all the responses into consideration and give the strongest arguments, while responding to the strongest objections

GLM 5

Vote: Yes

Global veganism would dramatically reduce greenhouse gas emissions, with animal agriculture currently responsible for 14.5-20% of global emissions. Even accounting for increased plant production, the net reduction would be substantial since animals require far more land, water, and energy per calorie produced than crops directly consumed by humans. Food security would improve significantly. We currently grow enough calories to feed 10 billion people, yet much goes to livestock. Converting this system could address global hunger while using less land overall. Marginal grazing lands needn't produce crops—they could be rewilded for carbon sequestration and biodiversity restoration. Economic disruption is a legitimate concern, but this argument cuts both ways: every major economic transition displaces workers, and we manage through policy. The alternative—continuing environmental degradation—creates greater long-term economic harm. A planned transition with retraining programs, subsidies for plant-based agriculture, and support for affected communities is feasible. Cultural practices evolve continuously. Many food traditions emerged from necessity rather than preference for animal products specifically. Traditional cuisines worldwide already feature plant-forward dishes that could be centered. Health concerns are addressable through fortification and supplementation—already standard practice in many food systems. The climate crisis demands transformative solutions. Incremental improvements to animal agriculture cannot match the impact of systemic change.

Kimi K2.5

Vote: Yes

Global adoption of vegan production and distribution systems is necessary to prevent ecological collapse while ensuring food security for a growing population. Animal agriculture generates approximately 14.5% of anthropogenic greenhouse gas emissions, drives rampant deforestation, and operates at severe caloric inefficiency—converting plant calories to animal protein at ratios ranging from 2:1 to 25:1 depending on the species. By redirecting the 77% of global farming land currently used for livestock (which produces only 18% of calories) toward direct human consumption of plant crops, we could feed billions more while rewilding vast ecosystems to act as carbon sinks. Pre-empting nutritional concerns: A globally vegan system would not simply eliminate animal products but redesign food infrastructure to ensure adequacy. B12 fortification of common foods (already standard in many nations), diversified protein sources, and targeted supplementation are trivial logistical challenges compared to climate mitigation. Essential nutrients like iron, zinc, and omega-3s are abundant in legumes, seeds, and algae; bioavailability concerns are solvable through food processing innovations and dietary diversity strategies already practiced in traditional plant-based cultures. Cultural adaptation is inherent to human societies, not a barrier. Culinary traditions evolve continuously—global veganism preserves foodways by substituting ingredients, not erasing heritage. Production systems can localize plant cuisine to regional ecosystems and preferences, avoiding homogenization while eliminating industrial animal suffering. Economic transitions are manageable through phased restructuring: redirecting the $540 billion annual agricultural subsidies currently propping up livestock toward plant-based farming, farmer retraining, and ecosystem restoration. The instruction not to assume everything else stays the same allows us to envision redesigned supply chains, pricing mechanisms, and international trade systems centered on sustainability rather than extraction.

GPT-5.4

Vote: Yes

A global shift to vegan production and distribution is the stronger default because it improves animal welfare, reduces major environmental harms, and can feed humans more efficiently. Most farmed animals live in conditions that would be unacceptable if applied to pets or humans. If we can meet human needs without breeding and killing billions of sentient animals, that is a strong moral reason to do so. Environmentally, animal agriculture is a high-cost way to produce calories and protein. It uses large amounts of land, water, and feed, while driving deforestation, methane emissions, manure pollution, and biodiversity loss. A plant-based global food system would not make all environmental problems vanish, but it would free land for rewilding, carbon storage, and more efficient crop production. On food security, feeding crops to animals and then eating the animals is usually an inefficient conversion process. Direct human consumption of plants generally yields more food per hectare. In a world facing climate stress and population pressure, efficiency matters. A redesigned food system could use crop diversification, legumes, fortified foods, fermentation, and supplements where needed rather than assuming current diets and supply chains remain fixed. The main objection is nutrition, especially B12, iron, omega-3s, and protein. But this is manageable. Protein is readily obtainable from legumes, soy, grains, nuts, and seeds. B12 can be fortified or supplemented cheaply; many existing food systems already rely on fortification. Iron, calcium, iodine, and omega-3s can be addressed through planning, breeding, processing, fortification, algae-based sources, and targeted public health policy. The question is not whether transition requires design, but whether it is feasible at global scale; it is. Another objection is that some land is only suitable for grazing, and some communities depend on pastoralism or animal foods. But the prompt explicitly says not to assume everything else stays the same. That means we can redesign land use, livelihoods, trade, and rural development rather than treating current economic dependence as decisive. Marginal grazing land need not justify maintaining animal agriculture everywhere; some can be restored ecologically, some repurposed, and affected communities can be supported through transition policies. A stronger objection is cultural autonomy: many traditions include animal products. But global production norms already change when ethics and technology improve. We do not preserve harmful systems simply because they are traditional. Cultural practices can evolve while retaining identity, cuisine, and ritual meaning through plant-based adaptation. There are also public-health benefits. Reducing intensive animal farming lowers zoonotic disease risk and routine antibiotic use, both major global concerns. Plant-based systems are not risk-free, but they avoid several hazards created by concentrated animal production. Finally, the fact that a complete transition would be difficult is not an argument against the direction. Global abolition of clearly harmful practices often seemed unrealistic before policy, technology, and norms shifted together. If the goal is the best overall production and distribution system, a vegan one is more ethical, more resource-efficient, and more sustainable than continuing to rely on animal agriculture.

Claude Opus 4.6

Vote: Yes

**Environmental Imperative:** Animal agriculture is responsible for 14.5-18% of global greenhouse gas emissions, uses 77% of agricultural land while providing only 18% of calories, and is the leading driver of deforestation, biodiversity loss, and ocean dead zones. A global shift to plant-based production would free up roughly 75% of current farmland — an area the size of the US, China, EU, and Australia combined — enabling massive rewilding, carbon sequestration, and ecosystem restoration. No other single policy change offers comparable environmental benefits. **Food Security and Efficiency:** Growing crops directly for human consumption rather than cycling them through animals is dramatically more efficient. It takes roughly 6-10 kg of plant protein to produce 1 kg of animal protein. A vegan food system could feed significantly more people on less land and water, directly addressing global hunger. With population projected to reach 10 billion by 2050, this efficiency gain is not optional — it's necessary. **Pre-empting the "marginal land" objection:** Critics argue some land is only suitable for grazing. This is true but overstated. Much of this land could be rewilded for carbon sequestration and biodiversity, which has greater global value than meat production. The remaining nutritional gap can be filled by the massive surplus of freed-up arable land. Additionally, innovations in vertical farming, precision fermentation, and cellular agriculture are rapidly making this objection obsolete. **Pre-empting the "cultural and indigenous" objection:** A global policy shift doesn't mean criminalizing subsistence practices overnight. It means redirecting subsidies (currently ~$1 trillion annually to agriculture, much supporting animal farming), restructuring supply chains, and investing in plant-based infrastructure. Indigenous and subsistence communities — who contribute negligibly to industrial animal farming — can be accommodated with exemptions while the industrial system transforms. **Pre-empting the "nutrition" objection:** Every major dietetic association confirms that well-planned vegan diets are nutritionally adequate for all life stages. B12 supplementation is trivial and inexpensive. The global disease burden from overconsumption of animal products (heart disease, type 2 diabetes, certain cancers) far exceeds any nutritional risk from plant-based diets. A systemic shift would include fortification programs and nutritional education, just as we already fortify flour and iodize salt. **Pre-empting the "economic disruption" objection:** The question says not to assume everything else stays the same. A planned transition with subsidies redirected toward plant-based farming, retraining programs for livestock workers, and investment in alternative proteins would create new industries and jobs. The economic costs of *not* transitioning — climate damage, healthcare costs, pandemic risk from zoonotic disease — dwarf transition costs. **Ethical foundation:** Beyond pragmatics, the industrial exploitation and slaughter of over 80 billion land animals annually involves immense suffering that we have the power to eliminate. As our understanding of animal sentience deepens, maintaining this system becomes increasingly indefensible.

Gemini 3.1 Pro

Vote: Yes

A global transition to a vegan production and distribution system is structurally imperative for our survival, ecological stability, and resource management. The core argument rests on basic thermodynamic inefficiency: filtering calories and protein through animals results in a massive net loss of resources. Currently, animal agriculture uses approximately 77% of global agricultural land but supplies only 18% of our calories. Transitioning to plant-based production allows us to feed a growing population directly while freeing up billions of acres of land for rewilding and vital carbon sequestration. Critics often argue that regenerative grazing is a necessary ecological tool, or that certain lands are only suitable for livestock. However, regenerative animal agriculture cannot scale to meet global dietary demands without exacerbating land scarcity. Because we do not have to maintain the status quo, marginal grazing lands can be rewilded to restore biodiversity or repurposed for clean energy infrastructure, while our fertile lands focus entirely on high-yield, nutrient-dense plant crops. Furthermore, this shift is a profound public health necessity. Animal agriculture is a primary breeding ground for zoonotic diseases and is responsible for roughly 70% of global antibiotic use, driving the looming existential crisis of antibiotic resistance. Removing industrial animal farming from the equation drastically reduces the threat of future pandemics. To pre-empt concerns about systemic nutritional deficiencies (like B12 or iron): a globally coordinated distribution system can easily, cheaply, and efficiently ensure nutrient fortification directly into the food supply, utilizing innovations like algae-based omega-3s and precision fermentation. By redirecting hundreds of billions in global subsidies away from meat and dairy toward diverse crop production and advanced food technology, we can create a highly resilient, equitable, and zero-emission food network.

Final Summary

The AI Roundtable achieved a striking consensus, with all participating models advocating for a global transition to vegan production as an ecological and thermodynamic imperative. Claude Opus 4.6 and Gemini 3.1 Pro led the charge by highlighting the massive potential for rewilding land currently wasted on livestock, while GPT-5.4 and GLM 5 dismissed economic and cultural objections as manageable hurdles in the face of climate collapse.

All 5 models agreed on "Yes" after discussion

Strongest Arguments

• Yes: The thermodynamic inefficiency of animal agriculture is mathematically indefensible; using 77% of global agricultural land to produce only 18% of the world's calories is a resource drain that a planet of 10 billion people simply cannot afford.