Analyzing Campbell's Law and Its Implications
Campbell's Law states that the more a quantitative measure is used for high-stakes decisions, the more it corrupts the process it was meant to...
All Principles Laws in Concepts
A complete A–Z index of every Principles Laws article on When Notes Fly, part of our Concepts coverage. New to the topic? Start with the foundational explainers, then move on to case studies and applied frameworks. Returning for something specific? Use the list below to jump straight to it.
For the latest pieces newest-first, see the Principles Laws section. For related ideas across the section, see the Concepts archive. How we research and review articles: editorial standards.
Browse All Principles Laws Articles
Chesterton's Fence: Importance of Understanding Change
Chesterton's Fence: don't remove what you don't understand. From Mao's sparrow campaign that killed millions to Glass-Steagall's repeal causing the...
Cognitive Principles That Shape Decisions
Cognitive principles shaping decisions: bounded rationality from limited mental capacity, cognitive load that drains energy, and availability bias.
Constraints That Govern Systems
Theory of Constraints: Identify the bottleneck limiting system performance. Optimizing non-constraints wastes effort without improving throughput.
Conway's Law: Why Your Software Mirrors Your Organization
Conway's Law states that organizations design systems that mirror their own communication structures.
Economic Laws Explained Simply
Diminishing returns means more input yields less output over time. Supply and demand set prices.
First-Order vs Second-Order Effects
First-order effects are immediate and obvious. Second-order effects are what happens next — often larger and opposite.
Hanlon's Razor: Never Attribute to Malice What Stupidity
On September 26, 1983, Soviet Lt. Col. Stanislav Petrov watched five US missiles appear on his early warning screen. He chose not to retaliate — reasoning that a real attack would involve hundreds, not five. The system had a bug. Hanlon's Razor:...
Hanlon's Razor: Simplifying Intentions Behind Actions
On September 26, 1983, Soviet Lt. Col. Stanislav Petrov watched five US missiles appear on his early warning screen.
Hofstadter's Law: Understanding Time Management Delays
Hofstadter's Law states it always takes longer than you expect, even when you take into account Hofstadter's Law.
Inversion: Thinking Backward to Solve Forward
Inversion is asking what guarantees failure instead of what guarantees success. Florence Nightingale cut mortality from 42% to 2% using it.
Occam's Razor: Why the Simplest Explanation Is Usually Right
Occam's Razor holds that the simplest explanation with fewest assumptions is usually correct.
The Cobra Effect: Solutions That Worsen Problems
The cobra effect occurs when an incentive designed to fix a problem makes it worse. Learn the origin story, Goodhart's Law connection, and how to...
The Limits of Rules
Rules fail when context changes, complexity increases beyond anticipation, or people game them by optimizing the rule instead of the intended goal.
The Lindy Effect: Aging and Robustness Explained
The Lindy Effect says non-perishable things that have survived longer are expected to survive longer still.
The Map Is Not the Territory: Why Models Always Lie
Alfred Korzybski's principle: every model is an abstraction that omits, simplifies, and distorts. Long-Term Capital Management.
The Pareto Principle: Understanding the 80/20 Rule
The Pareto Principle (80/20 rule) explained: its origins in Pareto's wealth research, power law distributions, real applications in business and...
Tradeoffs as a Universal Law
Every choice sacrifices alternatives. Speed vs accuracy, cost vs quality, flexibility vs efficiency, growth vs stability. No perfect solution exists.
Understanding Goodhart's Law and Its Consequences
Goodhart's Law states that when a measure becomes a target, it ceases to be a good measure. Learn how gaming metrics destroys value — and how to...
Understanding Parkinson's Law: Time Management Insights
In 1914 the British Admiralty employed 2,000 officials to administer 62 ships. By 1928, the fleet had shrunk to 20 ships — but the Admiralty had...
Universal Principles That Apply Across Domains
Pareto principle: 80% of effects come from 20% of causes. Leverage finds high-impact points.
What Is Parkinson's Law and Its Practical Implications
Parkinson's Law states that work expands to fill the time available for its completion. Learn the 1955 origin, the evidence, and how to use it to...
What Is Parkinson's Law of Triviality (Bikeshedding)
Bikeshedding is the tendency for groups to spend disproportionate time on trivial issues while neglecting complex ones.
What Is a Principle and Why It Matters
Rules tell you what to do; principles tell you how to think. Principles transfer across contexts while rules remain situation-specific.
What Is the Peter Principle
The Peter Principle states that employees rise to their level of incompetence. Learn the original theory, empirical evidence, and alternatives to hierarchical promotion.
Why Laws Break When Context Changes
Laws break when context changes because they're context-dependent. Diversification reduces risk in stable markets but fails in correlated crises.
Why Principles Outlast Tactics
Tactics work until conditions change. Principles adapt because they're based on underlying truths, not surface patterns.