New Zealand schools have introduced a climate change resource that suggests children “eat less meat and dairy”, even though teachers will not know how much meat or dairy any child in their care has eaten. Opinion pieces in the papers have called for the reduction of meat and dairy in hospital menus, not usually generous sources of such foods, despite the well-known risks of undernutrition, especially of protein, in the frail and elderly. Globally, the influential and once-objective medical journal the Lancet has hosted Eat Lancet, a coalition of vegan and vegetarian technocrats backed by processed food manufacturers, and promoted their agenda. The Guardian newspaper accepted an $886,600 grant from the backers of Impossible Foods to run a series of articles against animal agriculture.
These initiatives, aimed at remodelling our food supply in a way that favours the multinational food processing and seed-and-chemical corporations, whose control of many aspects of farming and diet is already problematic, have run far ahead of the scientific community’s efforts to understand the health effects of such dietary change.
Our hunter-gatherer past
The Neolithic Revolution was the first alteration in human affairs that is generally considered worthy of the term Revolution. In Marx’s terms, it saw a change in the means of production sufficient to form new classes aware of their identities, and thus a change in the relations between people. Early humans had fed themselves in an opportunistic, hunter-gatherer fashion that tended to favour a diet of animals supplemented with plants where and when these were available. Large animals made the best meals but gathering activities could collect many smaller ones, as well as eggs, grubs etc.
The people of the Mesolithic era discovered that some animals could be herded and some plants grown in gardens (not usually by the same community, because one activity favours nomadism and the other favours a sedentary habit) but these activities, which greatly improved food security after the decline of the prehistoric mega-fauna due to hunting and climate pressures, tended to occur at the communal level and probably did not create major class differences between the people involved.
The invention of farming
The Neolithic Revolution, which unleashed the human potential for war, creativity, and social division, resulted from the identification of the germs of plants (specifically grains and legumes) as durable sources of energy. If grains were grown (I will use grains in the wider sense of “cereals”, after Braudel, including other dried germs such as peas) and there was a surplus, this surplus would still be edible over the next year, a year when drought or pests or diseases might wipe out the other food sources that hunter-gatherers depended on. This advantage was offset by the nutritional poverty of grain-based diets, so that tuberculosis probably became an endemic disease during this period, but the existence of a less-perishable surplus allowed the diversion of part of the population away from food gathering for large parts of the year, and saw the creation of armies and other workforces.
In Europe, the Neolithic Revolution is dated at around 10,000 BC and its arrangements are a matter of prehistory, but in China this change occurred later and the written record around Bi-gu or grain avoidance includes folk-memories of conflict between grain eating and grain avoiding peoples.
The history of colonisation is the history of the conquest of lactose-intolerant peoples by lactose-tolerant populations, and of non-grain eaters by grain-eaters. In the Indian sub-continent, a combination of dairy herding and a cereal diet high in legumes uniquely allowed the survival of a substantially vegetarian population, and saw the conservation of genes favouring reproduction on such a diet, including genetic polymorphisms still rare in European populations (adaptive mutations only predominate where many individuals without them have failed to survive or reproduce). That the Indian social system became more aggressively class-based than any other is probably no co-incidence; prejudice against meat-eating is still used as a tool of social control against minorities, while meat-eating is one way young Indians today identify as modern and egalitarian. However there were some important exceptions to the trend – the Aztecs were a hunter-gather people who conquered and dominated the Mesolithic agriculturalists of Mexico, and the Mongols were nomadic herders and hunters whose greater stamina and independence allowed them to defeat the rice-fed armies of the Chinese Emperors (after conquering this breadbasket, the successive Mongol Khans seem to have eaten and drunk themselves to death).
Early vegetarian ideology
In the European and Asian cereal-based societies the poorest classes went without meat, supplementing cereals when possible with buttermilk or blood pudding which were more economic replacements. The rich ate as much meat as they could. The idea that an entire society might avoid meat is a recent one with its roots in religious practice, and, insofar as it has any political basis, this flows in two distinct streams – the eco-fascist, in which meat avoidance is a sign of “purity”, most humans are a burden on the Earth, and the Indian vegetarians are of course Aryans. This is something like the vegetarian vision that Adolf Hitler picked up while studying anti-Semitism with Wagner’s heirs at Bayreuth.
And then there is a Marxist-Anarchist, and latterly Intersectional, version, founded on a valuation of animal rights as inseparable from, and a logical extension of, human rights. Vegetarianism was a frequent obsession of the early British Socialists; G.B. Shaw, who derived most of his energy from dairy fat and lived to the age of 94, made himself into a well-known example, and the idea was sufficiently entrenched among the British Socialists and their milieu that H.G. Wells preserved its internal contradictions for posterity in The Time Machine. In his far-future vision, humanity has evolved into two separate species. The Morlocks are descendants of working-class meat-eaters, the Eloi of leisure-class vegetarians – all Wells’ loathing is reserved for the Morlocks, yet it is obvious they are (still) the engineering brains keeping their world running and the Eloi fed. The Eloi are useless for anything but enjoying the sunshine and feeding the Morlocks, and the discordance in Wells’ progressive values as he describes both species is as shocking as anything else in the story.
"But gradually the truth dawned on me: that Man had not remained one species, but had differentiated into two distinct animals: that my graceful children of the Upper-world were not the sole descendants of our generation, but that this bleached, obscene, nocturnal Thing, which had flashed before me, was also heir to all the ages."
The first large-scale experiment in plant-based protein was attempted by the Bolsheviks. As usual, it’s hard to separate the roles played by idealism and cynicism in the story, but the bare bones are that the Soviets found their initial attempts to remodel the countryside rebuffed, blamed this on the recaltricance of the kulak class, and set out to destroy them. The problem being that the kulaks, owning most of the cattle and sheep across the Russian Republics, helped to feed the people. Beginning in the 1920s, soy experts from the USA (then the Western world’s leading soy producer) were among the many foreign technicians imported into Russia, and soy processing plants were built and soy production increased to 283,000 tonnes in 1931, the year Stalin unleashed enforced collectivisation and the terror against the kulaks (and also the Kazakhs, a herding people who suffered the largest proportionate loss of life during this period). This led to the loss of millions of animals, either killed by their dispossessed owners or mismanaged by their inexperienced new owners. The soy project was hardly able to prevent the massive famines that followed, and by 1935 soy production had dropped to 54,000 tonnes. Though soy milk would later prove useful during the siege of Leningrad, by the 1930s soy had probably only served one purpose, as a statistic needed aforehand to quell the objections of pragmatic delegates to the destruction of the kulaks and their livestock.
Today we face the revival of this idea, of plant protein that will create a world with no need for animal protein, and the remodelling of life in the countryside, with the new impetus of climate change as its driver. Livestock cycles natural carbon, meaning there is no net addition of C02 to the atmosphere – and its contribution to the shorter-lived methane precursor has not changed since 2000 (methane rises have been due to fracking, methane itself AKA “natural gas”, landfill, and rice production; methane-emitting animals have always existed on Earth in substantial numbers, and have not created a novel situation in the sense that the discovery of coal, oil and gas did). We have recently seen how much global disruption is required to reduce fossil fuel CO2 emissions to 2006 levels, levels which will still warm the planet if they continue. It could be still be worth reducing agricultural cycling of CO2 through methane, which is more warming than CO2 if this is cost-free, but is it?
Why humans evolved as meat eaters
Animal foods, and especially red meat, supply a constellation of nutrients not found together (if they are found at all) in any plant food. Nutrients are those chemicals essential for the functioning of the human organism, and plants, but not livestock, can survive well without nutrients such as amino acids, fatty acids, vitamins and minerals that are essential to humans. Surviving as a vegetarian or vegan is possible for some (perhaps assuming the genetic variants referred to earlier are present) but to thrive requires knowledge of these nutrients, where to find them, how to process the foods that supply them, or how to supplement them. Thriving as an omnivore or even a complete carnivore does not – nutritional sufficiency is the reason we evolved eating meat and other animal foods long before we learned there were such things as essential nutrients.
The reasons for avoiding meat or all animal foods can have a class basis – veganism may be taken up by educated middle-class adults, more likely to be exposed to “health food” ideas and aware of the need to supplement, some of whom then commercialise their habits as social media “influencers”. Meat avoidance is also being adopted increasingly by educated middle-class children for identity or compassionate reasons, but the poor may also avoid meat because of its cost when a loaf of bread or a packet of flavoured noodles can be bought for a dollar; these two motivations sometimes coincide when students in temporary poverty make a virtue of what they perceive to be a necessity.
Does the meat-avoiding behaviour of young people have unintended costs? Several observational studies have looked at the characteristics of meat-avoiding populations and found alarming increases in depression, anxiety and self-harm.
“The majority of studies, and especially the higher quality studies, showed that those who avoided meat consumption had significantly higher rates or risk of depression, anxiety, and/or self-harm behaviors. There was mixed evidence for temporal relations, but study designs and a lack of rigor precluded inferences of causal relations. Our study does not support meat avoidance as a strategy to benefit psychological health.”
How can we explain these correlations? Why should we assume that they are causal? There are several lines of evidence to support a causal link:
1) several nutrients found in meat and animal foods are important factors in mood and cognition; vitamin B12, iron, carnitine, DHA, choline and tryptophan are some examples.
2) the fatty acid mix in dairy and red meat has a similar composition to that of amniotic fluid and breast milk which has anxiolytic (anti-anxiety) effects in young animals.
3) soy is a convenient and cheap replacement for animal protein; soy processing in Western diets results in a 10-fold higher level of the estrogenic contaminant isoflavone than that found in Asian diets. Soy isoflavone causes anxiety behaviour in young female animals, and there is evidence supporting psychotropic and hormonal effects in humans.[7,8,9.10] Interestingly, while right-wing critiques of soy eating focus on effects it can have on young men, the scientific evidence for adverse effects in younger females, converting to HRT-like benefits after menopause, is stronger.
4) other toxins found in plants, such as salicylates and oxalates, as well as problematic proteins such as gliadin/gluten and zein, may be present at higher levels in meat-free diets (but are not unique to them). A vegan mince sold in Countdown supermarkets is simply a coloured blend of soy protein and gluten, a protein linked to the risk of schizophrenia.
In the New Zealand context it would be relatively easy to confirm or dispute some of these associations. Everyone admitted to hospital for longer than a day supplies their dietary preferences. The dietetic preference data from psychiatric admissions could be both linked to outcomes over time and compared with the population average distribution, or the distribution in a ward where diet is least likely to play a role in admissions.
Iron deficiency in women
Young women in New Zealand are the most likely to report being vegan or vegetarian in surveys, as elsewhere in the world. Vegans in the Gender Studies field generate papers linking meat to masculinity, with the implication that this masculinity is toxic and might be improved by a plant-based diet. The corollary of this belief – that women may therefore be weakened by meat-avoidance – is never considered. In a 1980 essay by Gloria Steinem called The Politics of Food (in the collection Outrageous Acts and Everyday Rebellions) she describes some of the cultural constructs by which women are deprived of the good nutrition which men use to stay dominant. The belief that men need to eat red meat more often than women may have been valid when the average man was more likely to have to survive an attack by a wild bear than the average woman, but today it is mainly women who suffer from serious iron deficiency. The rate – and the cost to the health system – is increasing in New Zealand as more women give up meat. Iron deficiency anaemia in early pregnancy is associated with neurodevelopmental disorders in children, not an outcome that will increase the mother’s autonomy.
In Georg Büchner’s 19th century “working class tragedy” Woyzeck, filmed by Werner Herzog with Klaus Kinski in the leading role and the subject of an opera by Alban Berg, the title character, a soldier, is subject to experimentation by a sadistic army doctor. The experiment involves Woyzeck living on nothing but peas. Peas may supply a complete protein, but Woyzeck goes insane; the deprivation being the final straw in his alienation. James Cameron, the film-maker responsible for Avatar and Titanic, is investing heavily in pea protein as if this were his gift to New Zealand. I am not sure whether he has watched Woyzeck – one would think he has.
Plant-based vs meat-based
Again, we have the specificity of plant germs as commodity; their low cost of production, long storage life and versatility of processing outcomes makes them an ideal investment and a robust one, as poverty and adversity increases their consumption, as we saw during the 2020 Lockdown Event. However, a plant-based burger is nutritionally greatly inferior to a meat burger, and that burger is often the most nutritious single food item many will people eat in the course of their day. The current push to eat a plant-based diet for “planetary health” is something that all the multinational food processors have signed up and provided funding for, and why not – Coca Cola, Unilever, Nestlé have always sold us plant-based foods. We notice that while iron-deficiency anaemia increases in New Zealand with the reason in plain sight, Nestlé scientists here in NZ are developing a more potent form of supplemental iron to add value to their products as their parent company backs the push to reduce meat. (As usual, it’s hard to separate the roles played by idealism and cynicism in the story).
But, you may well ask, isn’t eating meat linked to an increased risk of cancer and heart disease? These associations are small to begin with, but they are also intensely confounded by social class and educational status. Supposing a factory that makes a carcinogenic chemical is hiring. Who is more likely to apply for that job – a meat eater (who will likely have a bigger family to support, among other considerations) or a vegan? Who, so to speak, eats all the pies, and needs food that is filling and nutritious without having to give it much thought? Who is more likely to work two jobs and be exposed to the disruptive metabolic effect of shift work? Carcinogen exposure and shift work are just two of the confounding variables ignored in diet epidemiology. (That meat-eating in Western populations may symbolise or associate with labour itself – as it did for H.G. Wells when he wrote The Time Machine – is not a consideration I have found discussed in the epidemiological literature.)
Certainly one can think of mechanisms that might link meat to disease, as one can with any food, but one can also think of protective mechanisms; several of the nutrients found mainly or only in animal foods are required for various antioxidant and immune defensive enzymes, and some like carnitine and EPA even have a place in the management of heart disease.
The argument against meat-eating should not be confused with the argument for sometimes rationing a valuable food that is in short supply. The wartime rationing of meat in the UK is thought to have improved the health of the poorest by guaranteeing a greater supply than they had had previously, at a more affordable price. In Europe, the peasants who supplied the cities with meat, dairy and luxury foods such as oysters were sometimes forced by network disruptions to consume these foods – which many of them had never tasted before – with benefit to their own health.
The plant-based agenda can scarcely be expected to recognise these benefits, or understand the argument summarised by Williams and Dunbar (with regard to the vitamin nicotinamide and amino acid tryptophan in their tuberculosis paper), that if better data collection and analysis resulted in us ”…returning to our egalitarian past and redistributing meat or its components that supply NAD (avoiding both the highs and the lows between individuals and over individual lifetimes) [this] may be more effective than subsidizing corn grain (while the increased prosperity from unlocking human potential should pay for the intervention).”
Progress – which includes unlocking human potential from the chains of preventable mental and physical disease – depends on good data, and we do not yet seem to collate the data required to know whether or for whom plant-based diets are safe in New Zealand.
George Henderson works as a researcher for Professor Grant Schofield and the team behind the What The Fat books and the social enterprise PreKure, which has been running free lifestyle and health programs through the lockdown. He is the author or co-author of several scientific articles and letters published by the BMJ, Lancet Diabetes and Endocrinology, the JAMA, and other journals, including an influential review of low carbohydrate diets in diabetes management for the New Zealand Medical Journal. A musician, songwriter and amateur musicologist, he has recently presented a series of podcasts on 20th century women composers for Karyn Hay’s Lately show on RNZ.
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This article originally appeared on the Redliner blog