Good ideas are slow hunches, not sudden flashes

Johnson opens by attacking the "eureka moment" myth — the cultural image of a genius struck by sudden insight, like Archimedes in the bathtub. Real innovation histories, when traced carefully, usually reveal a slow hunch: a partial, half-formed idea that lingers in someone's mind for months or years, gradually connecting with other fragments until it coheres into something usable.

He points to Darwin's own notebooks as an example — the theory of natural selection wasn't a single flash of insight on the Beagle, it developed gradually across years of note-taking, revision, and cross-pollination with ideas from economics and geology that Darwin was reading concurrently.

This reframing matters practically: if breakthroughs are slow hunches rather than lightning strikes, then the discipline of capturing and revisiting half-formed ideas over time — rather than waiting passively for inspiration — becomes the actual skill of innovation.

Takeaway: treat your unfinished, half-formed ideas as valuable works in progress worth revisiting, not failures of insight to be discarded.