Influence: The Psychology Of Persuasion By Robert B. Cialdini PHD

Influence: The Psychology of Persuasion by Robert B. Cialdini (Paperback, 4th Revised Edition, Harper Business, 2021; ~320 pages) is the definitive guide to how and why people say “yes.” Based on Cialdini’s three‑year undercover field research in sales, fund‑raising, and car dealerships, the book reveals the six universal principles of influence—reciprocity, commitment & consistency, social proof, authority, liking, scarcity—and in the expanded edition, introduces a seventh: unity. Rich with engaging anecdotes and empirical insight, this timeless classic equips readers to persuade ethically and resist manipulation in business, marketing, and everyday life.