How to Win Friends and Influence People remains the foundational text on interpersonal influence nearly a century after publication, cited by authors spanning negotiation, sales, communication, and leadership. Robert Cialdini discusses Carnegie's principles when explaining the liking effect in Influence, Keith Ferrazzi profiles Carnegie in his "Connectors' Hall of Fame" in Never Eat Alone, and William Ury applies Carnegie's advice to see things from the other person's point of view as the core of his breakthrough negotiation method.
Stephen Covey notably classifies the book as part of the "Personality Ethic" rather than the deeper Character Ethic he advocates, while Susan Cain in Quiet examines it as a key artifact of the Extrovert Ideal. Readers consistently find its principles timeless and immediately useful, though more recent authors like Marshall Rosenberg in Nonviolent Communication accept the empathic-listening tradition while pushing beyond what they see as its instrumentalism.