Introduction and Overview › Glossary for the Networking Language · 12 min read
A vegetarian diet refers to a way of eating that avoids meat and usually also fish.
Depending on the specific form, other animal-based foods may still be consumed, such as:
Vegetarian diets therefore encompass various forms and personal choices.
Vegetarian diets are significantly older than the modern term "vegetarian."
Forms of meat-free eating have been documented across different cultures and historical contexts. Their motivations were not always the same. Religious beliefs, ethical questions, philosophical convictions, health considerations, and the relationship between humans and other living beings played varying roles at different times.
Particularly long traditions can be found in South Asia.
In various strands of Hinduism, Jainism, and Buddhism, ideas developed in which the treatment of other living beings is closely linked to one's own way of life.
A key role is played by Ahimsa, the principle of non-harming or non-violence toward living beings.
However, there is no uniform vegetarian tradition. Dietary practices and their religious, cultural, and philosophical justifications differ significantly between regions, communities, and historical epochs.
Debates about killing and eating animals can also be found in European antiquity.
A particularly well-known association is with Pythagoras and later Pythagorean traditions. Long before the word "vegetarian" became established, a meat-free diet in the European linguistic sphere was sometimes referred to as Pythagorean diet.
The modern organized vegetarian movement developed much later.
In the 19th century, communities and reform movements emerged, particularly in Britain, that linked meat-free diets with questions of health, religion, social change, and the relationship between humans and animals.
The term "vegetarian" spread in this context during the first half of the 19th century.
On September 30, 1847, the Vegetarian Society was founded in Ramsgate, England. This gave the modern vegetarian movement a lasting organizational form.
However, the boundaries between different forms of plant-based and vegetarian diets were less clearly defined at the time than they are today.
Within the vegetarian movement, debates continued for decades over whether, for example, milk and eggs should be part of a vegetarian lifestyle.
This discussion was also significant for the later emergence of the vegan movement.
In 1944, Donald Watson and other members from the British vegetarian movement founded the Vegan Society, coining the new term "vegan".
This increasingly created a conceptual distinction between vegetarian diets, which may still include certain animal-based foods like milk or eggs, and vegan diets or the broader concept of veganism.
The history of vegetarian diets cannot, therefore, be reduced to a single origin.
It connects very different developments:
Vegetarian diets are thus not an exclusively modern way of eating. Their historical roots extend far back, while their current conceptual and organizational form was largely shaped by the vegetarian movements of the 19th and 20th centuries.
People choose a vegetarian diet for various reasons, including:
A vegetarian diet can significantly reduce the consumption of animal-based foods and bring questions about their origin and production into sharper focus.
At the same time, a vegetarian diet does not automatically mean that a diet or the underlying agricultural system is free from animal suffering.
Especially when milk, cheese, or eggs remain part of the diet, there is still a direct connection to animal husbandry.
Therefore, even with a vegetarian diet, it is important to consider how these animals live and how their entire life cycle is managed.
Even within a vegetarian diet, different agricultural contexts exist.
Milk, cheese, and eggs can come from small-scale, pasture-based, or diverse farm systems. They can also be part of highly specialized and industrial production chains.
Plant-based foods also differ in terms of:
The term "vegetarian" therefore does not describe the quality of the entire food supply system.
Animals can fulfill various roles within a farm and landscape system.
Depending on the location, they contribute, for example, to:
These functions depend on the animal species, husbandry practices, stocking density, climate, landscape, and management. Animal husbandry must therefore always be considered in its specific context.
Today, vegetarian diets exist alongside other clearly defined dietary categories.
People distinguish, for example, between:
These categories can help people make personal decisions and describe their diets.
However, when such categories are applied as rigid frameworks to a living ecosystem, a fundamental conflict arises.
A natural ecosystem does not recognize this classification.
It has evolved over very long evolutionary periods from relationships between plants, animals, fungi, microorganisms, water, soil, climate, and landscape.
Plants are eaten.
Animals eat plants and other animals.
Animals pollinate plants and spread seeds.
Organisms die.
Fungi, animals, and microorganisms decompose their bodies.
The nutrients bound within them become part of the soil again and can be taken up anew by plants and other organisms.
Life arises, passes away, and becomes the foundation for other life.
These relationships cannot be meaningfully divided into the human dietary categories of vegan, vegetarian, and animal-based.
A fundamental reality of human nutrition is that we live by utilizing other life processes.
When we harvest a plant, we intervene in its life or—depending on the plant and harvesting method—end its life.
When we slaughter an animal, we end that animal’s life.
When we cultivate grain, we alter a habitat, harvest plants, and affect numerous other organisms in the process.
When we harvest fruit, the tree does not have to die. Nevertheless, fruit cultivation also requires land, water, nutrients, and a managed habitat.
Even fermentation relies on the activity of living microorganisms.
Humans cannot, therefore, completely separate nutrition from other life.
We live because other life sustains us.
This does not mean that every form of killing, using, or intervening is equivalent.
Precisely because we depend on other life, responsibility arises.
The crucial question is therefore not whether human nutrition can occur entirely without affecting other living beings.
The question is:
How can we obtain food while responsibly handling the life on which our own lives depend?
Vegetarian diets are often associated with a reduction in animal suffering.
However, the term vegetarian alone says nothing about how the animals lived whose milk, eggs, or other products are used.
Milk does not arise independently of a mammal’s reproductive cycle.
Dairy farming therefore involves much more than just milking an animal. It includes reproduction, birth, rearing, lactation, feeding, health, rest periods, the aging of animals, and ultimately their end of life.
The same applies to eggs.
Egg-laying hen farming includes breeding, reproduction, rearing, husbandry, feeding, health, and the handling of animals whose laying performance declines. The question of what happens to male animals is also part of this system.
A vegetarian diet does not eliminate these connections.
Therefore, even vegetarian food production can be associated with significant animal suffering.
This becomes particularly problematic where animals are reduced to a single function.
For example, the life of a dairy goat in a highly performance-oriented system may be largely shaped by reproduction, lactation, milking, and corresponding performance demands.
How much an animal is burdened by this depends on breeding, husbandry, health management, milking regimes, reproductive management, duration of use, and sufficient rest and dry periods.
The crucial question therefore goes further:
What does the entire life of the animal look like whose milk, eggs, or other products we use?
From the perspective of a qualitarian, milk, eggs, and meat cannot be completely separated.
Where animals are kept for milk or eggs and bred, animals are also born that do not produce milk or lay eggs.
Animals are born.
They grow.
They can reproduce.
They age.
They may become ill.
And they die.
Milk and egg production are therefore always connected to the entire life cycle of the animals.
A society may decide not to eat certain parts of this cycle. However, these parts do not disappear from the agricultural system.
This raises a fundamental question for vegetarian diets.
If milk and eggs are used while the consumption of meat is fundamentally excluded from one’s own diet, it must still be answered what happens to the animals born within this husbandry system that are no longer kept for milk or egg production.
The question of meat does not automatically disappear.
It may simply be shifted to another part of the system.
A coherent animal husbandry system must therefore answer questions such as:
From this perspective, even the use of meat from a well-kept and responsibly slaughtered animal can be part of a coherent overall system.
This creates a tension:
A vegetarian diet may arise from the desire not to have an animal killed for one’s own nutrition while still using animal-based foods whose complete life cycle includes birth, use, aging, and death.
Therefore, qualitarianism does not consider only the food on the plate.
The entire life path of the animal and the agricultural system in which it takes place are examined.
A personal dietary choice and the design of an ecosystem are two different levels.
People can choose to live vegetarian, vegan, or with animal-based foods.
However, a habitat does not organize its ecological relationships according to these categories.
Grasslands remain habitats in which large herbivores can play important roles.
Soils remain shaped by complex relationships between plants, animals, fungi, and microorganisms.
Insects remain part of pollination and food chains.
Wild animals remain part of agricultural landscapes.
Death, decomposition, and the rebuilding of organic matter remain components of natural cycles.
When a society changes its diet, it must therefore also ask how the resulting agricultural systems interact with these existing relationships.
A dietary category alone cannot answer this question.
This connection affects vegan, vegetarian, and animal-based diets equally.
A vegan diet can originate from regenerative, diverse, and regionally embedded agricultural systems.
It can also rely on highly technical monocultures, intensive soil cultivation, external inputs, and extensive supply chains.
A vegetarian diet can be embedded in diverse farm systems with responsible animal husbandry.
It can also support milk and egg production in which animals live under problematic conditions.
An animal-based diet can come from site-adapted grazing systems with careful animal husbandry, humane slaughter, and as complete use as possible.
It can also rely on industrial intensive animal farming, imported feed, and significant burdens for animals and habitats.
The dietary category alone does not determine the quality of the underlying system.
The term Qualitarian moves nutrition beyond a purely product-based classification.
Central questions include:
A vegetarian diet can be part of this perspective.
Its classification arises from the quality of the entire ecological and agricultural context.
Qualitarianism therefore does not first ask:
Is a diet vegan, vegetarian, or animal-based?
The more important question is:
Which diet can emerge from this specific habitat while simultaneously preserving or developing its foundations of life?
This reconnects personal nutrition with the place from which food originates.
No human food system exists entirely outside of death, change, and the use of other life forms.
This realization does not imply indifference to suffering.
It establishes responsibility.
When we acknowledge that our own lives are sustained by other life, we can ask more precisely:
From this perspective, the task is not to conceptually remove humans from the cycle of life.
Humans are themselves part of this cycle.
Life sustains life. Food connects us directly to this cycle. What matters is the responsibility we assume within this relationship.
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By the TEIKEI editorial team, with support from AI (ChatGPT)
Created on August 7, 2026 · Last updated on October 10, 2026
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