Influence

In Influence, psychologist Robert Cialdini explains why people say 'yes' — and how to apply these insights ethically in business and everyday life. Drawing on decades of research and years spent undercover among salespeople, fundraisers, and recruiters, he identifies six universal principles of persuasion: reciprocity, commitment and consistency, social proof, authority, liking, and scarcity.

Cialdini shows how these levers of compliance operate largely outside our awareness, how they are exploited by "compliance professionals" to steer our decisions, and how understanding them can make us both more persuasive and more resistant to manipulation.

A foundational text in the psychology of persuasion, Influence has shaped marketing, negotiation, and behavioral science for decades.