Concept
Principle
Overview
A principle may relate to a fundamental truth or proposition that serves as the foundation for a system of beliefs or behavior or a chain of reasoning. They provide a guide for behavior or evaluation. A principle can make values explicit, so they are expressed in the form of rules and standards. Principles unpack values so they can be more easily operationalized in policy statements and actions.
In law, higher-order, overarching principles establish rules to be followed, modified by sentencing guidelines relating to context and proportionality. In science and nature, a principle may define the essential characteristics of a system or reflect a system's designed purpose. The effective operation would be impossible if any one of the principles were to be ignored. A system may be explicitly based on and implemented from a document of principles, as was done in IBM's 360/370 Principles of Operation. It is important to differentiate an operational principle, including reference to "first principles," from higher-order "guiding" or "exemplary" principles, such as equality, justice, and sustainability. Higher-order, "superordinate" principles (Super-Ps) provide a basis for resolving differences and building agreement/alignment.
Examples of principles include entropy in a number of fields and least action in physics. Examples in descriptive, comprehensive, and fundamental law include doctrines or assumptions forming normative rules of conduct, such as the separation of church and state in statecraft, the central dogma of molecular biology, fairness in ethics, etc.
In common English, it is a substantive and collective term referring to rule governance, the absence of which, being "unprincipled," is considered a character defect. It may also be used to declare that a reality has diverged from some ideal or norm, as when something is said to be true only "in principle" but not in fact.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
In the original texts
Passages from public-domain books where Principle is discussed.
The above principle is merely one of a certain number of self-evident logical principles. Some at least of these principles must be granted before any argument or proof becomes possible. When some of them have been granted, others can be proved, though these others, so long as they are simple, are just as obvious as the principles taken for granted.
Bertrand Russell, The Problems of Philosophy
names the idea; a chapter is titled for it; states what it is; opens on it
Is it some other vital principle external to it, or some materials out of which more vital principle is formed? And how, in either case, can the vital principle be conceived as other than a material something, which in its growth and multiplication behaves just as visible matter behaves?
Herbert Spencer, The Principles of Biology, Volume 1
names the idea; states what it is; the book is about it; opens on it
Hence the necessity that he should have been well trained in habits, who is to study, with any tolerable chance of profit, the principles of nobleness and justice and moral philosophy generally. For a principle is a matter of fact, and if the fact is sufficiently clear to a man there will be no need in addition of the reason for the fact. And he that has been thus trained either has principles already, or can…
Aristotle, The Nicomachean ethics of Aristotle
names the idea; states what it is; author linked in the graph; opens on it
In fact the objective principle of all practical legislation lies (according to the first principle) in the rule and its form of universality which makes it capable of being a law (say, e. g., a law of nature); but the subjective principle is in the end; now by the second principle the subject of all ends is each rational being, inasmuch as it is an end in itself. Hence follows the third practical principle of the…
Immanuel Kant, Fundamental Principles of the Metaphysic of Morals
names the idea; states what it is; the book is about it; opens on it
And, indeed, if it be the privilege of innate principles to be received upon their own authority, without examination, I know not what may not be believed, or how any one’s principles can be questioned. If they may and ought to be examined and tried, I desire to know how first and innate principles can be tried; or at least it is reasonable to demand the MARKS and CHARACTERS whereby the genuine innate principles may…
John Locke, An Essay Concerning Humane Understanding, Volume 1
names the idea; a chapter is titled for it; opens on it
Philosophers who discussed Principle
Related ideas
- Gottfried Wilhelm Leibniz
- Justice
- Separation of church and state
- Cosmology
- Classical conditioning
- Doctrine
- Law
- Species
- Quantum mechanics
- Roman Empire
- Aristotle
- Uncertainty principle
- Doctrine of the Mean
- Entropy
- Statecraft
Place in the tradition
Part of Atomism.