Jonah Berger Books

When we think of influence, we often imagine massive ad budgets or viral celebrities. But research consistently shows that personal communication—honest, human word-of-mouth—is far more powerful. People don’t trust ads; they trust each other. In my studies at Wharton, I analyzed how products, ideas,...

From Contagious: Why Things Catch On

People love to share things that make them look good. That’s social currency—the idea that we use what we talk about to shape how others see us. In the same way people display brands on their cars or clothes, they display ideas and stories that reflect positively on them. Take the example of *Pleas...

From Contagious: Why Things Catch On

Language doesn’t just describe reality—it constructs it. Every phrase we use invites listeners to see through a particular lens. Across domains from marketing to leadership, research shows that subtle shifts in language can produce outsized effects. In my work and in studies from psychology and lin...

From Magic Words: What to Say to Get Your Way

One of the simplest yet most potent discoveries in linguistic psychology concerns identity. The way we phrase actions can transform them into self-perceptions. When we say to a child, "help," we invite a temporary behavior. When we say, "be a helper," we invoke an identity. That small shift—from ver...

From Magic Words: What to Say to Get Your Way