Draft skeleton. Stage scenarios and anchor quotes are in place; the simulator and code panels are not yet wired.
It isn't a thing — it isn't special because we care about it. We are capable of caring because it is special. We exist as conscious individual entities at the level we exist at, because this level is actually distinct and different from the other ones. If it weren't distinct and different, we would not exist as we exist now. We would exist at some other level. The organism level is the level at which fitness covariances are maximally nested in eukaryotes. That's why thought is possible — neurons aren't competing with each other.
— 202_lec30_01
A — All seven cascades side by side
Display every nested-level transition the course named, with its Price ratio diagnostic and its empirical anchor. The student sees, in one view, that the same algebra produced every level of life on the planet.
Lesson 27 Gene → Chromosome | dachshund FGFR3 sweep
Lesson 28 Chromosome → Genome | meiotic drive + suppressors
Lesson 29 Genome → Cell | endosymbiosis + somatic mosaicism
Lesson 30 Cell → Individual | bee colony / Volvox / cancer
Lesson 31 Individual → Superorganism | honeybees / naked mole rats
Lesson 32 Superorganism → Lineage | fairy wrens vs platypus
Lesson 33 Beyond the species | memes / prions / holobionts
As you change scope, the individual becomes the population, and the population becomes the individual. I can shift my scope for the unit of selection. I could talk about cells as units of selection. I could talk about people as a whole. I could talk about families. Are his left and right arms the same individual? It depends on the scope. There's no privileged level. The thing we usually call "the individual" is just the level we happen to be looking at.
— 202_lec29_05
TODO: cascade visualization. One Price-ratio summary per level transition; let the student click any of them to drill back into the original lesson.
B — Why we exist where we exist
The eukaryotic organism level is where fitness covariances are most tightly nested. That's why we're conscious here and not, say, at the cellular level. Not because the organism is special by fiat — because, on Earth, this is where the cov-ratio diagnostic returns the cleanest "yes."
Your neurons cooperate because they're nearly genetically identical. The cost to a neuron to help another nearly identical, almost perfectly related neuron isn't actually a cost — genetically speaking. They're basically the same. That's why thought is possible — your neurons aren't trying to destroy each other.
— 202_lec30_03
TODO: nested-cov visualization. Show that the eukaryote level has unusually low within-level variance — and that this is why thought can happen.
C — The story of George Price
George Price derived the equation, found that altruism could only be selfishness in disguise, and could not live with the implication. He converted to Christianity, gave away everything, lived among strangers, and ultimately took his own life. The equation drove its own discoverer mad. The student should know this.
George Price hated his own equation. He wanted altruism to be real. So he set out to live a refutation of it. He converted to Christianity, gave away all his stuff, and went around doing random acts of kindness that in no way benefited him — for strangers in another country he had no relatedness to. He ended up cutting his own carotid artery with nail scissors in a deep depression, because he wasn't able to disprove his equation with his actions. The Price equation drove its own discoverer mad.
— 202_lec32_03 (corrected per accuracy.md: nail scissors, not nail clippers)
TODO: short narrative panel. The story of Price. The student doesn't compute anything here — they sit with the implication.
D — Course bookend
The course opened by saying evolution is motion, not gravity — a net change produced by many forces acting at once. The course closes by adding that the entities those forces act on are themselves products of the same process. Individuality is not given. It is a state the Price decomposition can diagnose. And the diagnostic returns the same kind of answer at every scale of life.
Evolution is not like gravity. It's not a force that exists independent of things. It's more like motion. If you're going to use a physics analogy, it's like motion. Evolution is the net change that results from many forces — a lot of things operating at once causing a change. That net change is what we call evolution.
— 202_lec01_03
TODO: course-bookend panel. Two-line callback to Lesson 1. Student deliverable: the cross-arc cov-ratio code from Lesson 30, applied to all branch datasets the student worked through, with a one-paragraph reflection on which level felt most surprising to them.