Dale Carnegie opens How to Win Friends & Influence People by establishing the book's foundational premise, drawn from decades of his own public speaking and human relations training practice: technical skill and knowledge alone account for a relatively modest share of professional and personal success, with the ability to genuinely deal effectively with people accounting for a considerably larger share.

Carnegie's foundational argument:

• He draws on his extensive experience training professionals across business contexts, arguing that even highly technically skilled individuals frequently underperform their potential due to inadequate interpersonal skill, while individuals with more modest technical skill but genuinely strong interpersonal capability frequently achieve disproportionate success
• Carnegie positions genuine human relations skill as a learnable, practicable set of specific techniques, rather than an innate personality trait some people simply possess and others lack, grounding this claim in his decades of successfully training diverse individuals in these specific techniques
• This foundational premise, first published in 1936 and subsequently revised, established many principles that have become so thoroughly absorbed into common interpersonal wisdom that contemporary readers may recognize them as familiar, testament to the book's enormous, sustained cultural influence

This foundational framing sets up the book's overall structure: specific, numbered principles across four main sections addressing fundamental techniques for handling people, six ways to make people like you, winning people to your way of thinking, and being a leader without arousing resentment.