Pre-Suasion: A Revolutionary Way to Influence and Persuade

by Robert B. Cialdini

I identified only six psychological principles that appeared to be deployed routinely in long-prospering influence businesses. I’ve claimed that the six—reciprocation, liking, social proof, authority, scarcity, and consistency—represent certain psychological universals of persuasion; and I’ve treated each, one per chapter, in my earlier book, Influence.