As armas da persuasão

Drawing on decades of research and undercover fieldwork in sales, fundraising, and marketing, Robert Cialdini identifies six core principles that reliably drive human compliance: reciprocity (the pull to repay what's given), commitment and consistency (justifying past choices), social proof (following what others do), authority (deferring to perceived experts), liking (yielding to people we find likable), and scarcity (wanting what seems limited).

Influence explains these principles as mental shortcuts humans rely on for fast decision-making — shortcuts that can be triggered ethically to build genuine rapport, or exploited to manipulate. A foundational text in behavioral psychology and marketing, it remains widely cited across sales, negotiation, and persuasion research.