The Environment
The surroundings and conditions that affect living organisms, including natural, built, social, and economic systems.
Nature
The physical world and living systems, often imagined as “non-human,” but in ES 1 includes human-influenced environments too.
Ontology
How we categorize what exists in the world (species, ecosystems, types of nature). A way of organizing reality.
Cycles and the Eternal Return
The idea that nature repeats in cycles rather than moving in a straight line.
Balance of Nature
Old belief that ecosystems naturally stay stable unless disturbed. Modern science shows nature is dynamic and not always balanced.
Great Chain of Being
Historical hierarchical ranking of existence (God → humans → animals → plants → minerals). Used to justify human dominance.
Cyclical Change vs Directional Change
Cyclical change repeats (seasons); directional change moves one way (evolution, climate warming).
Earth System Science
Study of Earth as an interconnected system (climate, oceans, land, life, humans all interacting).
Gaia Hypothesis
Idea that Earth’s living and nonliving components interact to regulate conditions that support life.
Chaos Theory
Small changes in certain systems (like weather) can lead to big, unpredictable outcomes.
Anthropocene
Proposed new geologic era where humans are the dominant force shaping Earth systems.
Environmental Kuznets Curve
Theory that pollution rises then falls as countries become wealthier.
Essentially Contested Concept
A concept people will always debate, like “nature,” “justice,” or “sustainability.”
Hobbes
Believed that without government, life would be chaotic and violent. Supports strong order and authority.
Malthus
Argued population grows faster than food, causing resource limits, famine, and collapse.
Darwin
Proposed evolution by natural selection. Species change over time based on survival and reproduction.
Marx
Saw capitalism as harmful to workers and nature due to constant pressure to exploit resources.
Marsh
Early environmental thinker who argued humans reshape and often damage ecosystems.
Carl Linnaeus
Created the modern scientific classification system for species.
Utilitarianism
Ethical theory that the right action is the one that produces the greatest good for the most people.
Natural Rights
Rights people have simply for being human (life, liberty, property).
Social Contract
Idea that people give up some freedoms to government in exchange for protection and order.
Enlightenment Era
Period emphasizing reason, science, rights, and progress.
John Rawls
Philosopher focused on fairness and justice.