What does it mean that root concepts anchor everything beneath them?

If a root concept is wrong everything organized beneath it inherits the error.

Example: A startup founder builds their entire product strategy on the root concept 'users want more features.' Every team — engineering, design, support — optimizes beneath that root: more features, faster. Two years later, churn data reveals users actually want fewer, simpler features that work reliably. The root was wrong, and every decision organized beneath it inherited the error. The company doesn't need better execution — it needs a different root.

Try this: Pick one domain of your life — career, health, a side project, a relationship. Write down the single deepest assumption that everything else rests on. Not a tactic or a preference — the foundational belief. Now ask: if this root concept were wrong, what would collapse? What would suddenly make sense that currently doesn't? Sit with the answer for five minutes before dismissing it.