Influence, New and Expanded: The Psychology of Persuasion is an international bestseller by Robert Cialdini that explains the psychology behind why people say yes and provides strategies to ethically use these principles in business and everyday settings. It provides readers with Cialdini's Universal Principles of Influence, including Reciprocation, Commitment and Consistency, Social Proof, Liking, Authority, Scarcity, and the newest principle, Unity. This book is backed by Cialdini's 35 years of scientific research and provides readers with a comprehensive guide to using these principles to persuade others.
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