It sounds like Carnegie teaches similar lessons a book I read earlier this year. Marshall Rosenberg's "Nonviolent Communication: a Language of Life" was one of the most important things I've ever read. It's written by a clinical psychologist-turned-peacemaker. He prescribes a simple method for conducting conversations based on principles of empathy and compassion and gives many examples of its successful use in diffusing conflicts from interpersonal relationships to civil wars. The framework is also helpful for internal dialogues and coming to terms with personal issues.