7 Powers
by Hamilton Helmer
A business is only defensible if it holds one of seven specific structural conditions that simultaneously give it a benefit rivals lack and a barrier stopping them from copying it — anything else erodes toward zero profit.
What it teaches
Helmer, a strategist and investor, imposes an unusually strict definition: power exists only where a benefit and a barrier are present together. A benefit without a barrier is copied and competed away; a barrier without a benefit protects nothing worth having. He then argues there are exactly seven such conditions. Scale economies, where unit cost falls with volume so a smaller rival cannot price-match without losses. Network economies, where each additional user raises the value to every other user. Counter-positioning, where a newcomer adopts a model the incumbent cannot copy without damaging its existing business. Switching costs, where leaving is expensive for the customer already committed. Branding, where long-built affinity commands a higher price for an objectively similar product. Cornered resource — preferential access to something scarce and valuable. And process power, capability embedded so deeply in an organisation that it resists imitation even when described openly. The framework's discipline is its value: it forces the question of which specific barrier applies, and treats merely being better at something as no advantage at all unless rivals are structurally prevented from matching it.
The ideas this book explains
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