Build a mental models map of this topic

Build a mental models map of this topic using only the sources in this notebook.

Produce:
1. First principles — the 4–6 most fundamental truths the entire topic rests on. State each in plain language and cite the source.
2. Core mental models — 5 models or frameworks the sources use, named or unnamed. For each: a one-line definition, what it lets you predict, and an example pulled from the notebook.
3. Analogies — 3 strong analogies (drawn from the sources or constructed from them) that make the topic feel intuitive to someone new. For each, note where the analogy breaks down.
4. Cause-and-effect chains — 2–3 "if X, then Y, then Z" sequences the sources support, with the relevant citation at each link.
5. A diagram-in-words — a flat-text outline showing how the models, principles, and chains connect.

The goal: someone reading only this output should be able to reason about the topic without re-reading the sources.