What you learn here
The Notebook explains evolution as change in populations over time, then builds outward into mechanism comparison, lineage splitting, and shared ancestry.
Purpose
A reader-facing study surface
Why it is organized this way
The current order is meant to start with population thinking, then move into the mechanisms and larger historical patterns that depend on it.
One threshold idea now has its own page
Population Thinking is now treated as an explicit concept because many beginner misconceptions come from missing the population-level frame it provides.
How To Use It
Choose an entry style
Start from a concept
Use this when you already know what you need explained, such as genetic drift, natural selection, or common descent.
Start from a sequence
Use this when you want the current recommended order for the first-ring core and do not want to guess which idea should come first.
If you are uncertain where to begin
Start with the Beginner Route. If you want to begin more directly, read the introduction and then Allele Frequency Change.
Longer-Form Context
Historical and interpretive pages
Introduction
Use the introduction for orientation about scope, non-adaptive versus adaptive change, and the role of the Notebook.
Punctuated Equilibria
Use this historical overview when a concept page is too narrow for questions about stasis, fossil interpretation, and speciation models.
Machine-readable companions still exist
The Notebook does not hide its JSON artifacts; it simply stops making them the first thing a visitor has to interpret.