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Book
Damon Centola · 2021
Centola's argument cuts against the folklore of virality: the things that actually change behavior — costly, contested, identity-laden things — do not spread like a simple infection from a single contact. They need repeated reinforcement from multiple trusted ties, which means the structure of a network, not just its reach, decides what moves through it.
Sequence ladder
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What this book knows
Behavior that demands real commitment spreads not like a virus through weak ties but as a complex contagion — needing reinforcement from wide, redundant bridges in the social network.
Illuminates
Editor’s framing
This is the spine of the network-mediated-adoption thesis that links Vela's behavioral-science lens to the wider question of how change travels. Centola's complex contagion refines the older diffusion curve and complicates the strength-of-weak-ties story — wide bridges, not just many weak ties, carry hard behaviors. Read it for the practical reframe: if you want to change what people do, build the network structure that reinforces it, rather than chasing the loudest single voice.
Read alongside · the magazine
Social reinforcement as the engine of adoption — complex contagion in practice.
Scholars: Damon Centola
0 published passages · book excerpt · research analysis
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