Daniel Stern conveys a scholarly but passionate tone in The Interpersonal World of the Infant. Stern, like many other pathbreaking social scientists, must straddle the line between careful argument and assertations apportioned to evidence and the excitement and allure of advocating a new theory. Stern makes a number of big promises and describes a number of big hopes in the process of the book and consequently sometimes comes off as one who claims too much for his theory.