Lee David Ross (August 25, 1942 – May 14, 2021) was a Canadian-American professor. He held the title of the Stanford Federal Credit Union Professor of Humanities and Sciences at Stanford University and was an influential social psychologist who studied attributional biases, shortcomings in judgment and decision making, and barriers to conflict resolution, often with longtime collaborator Mark Lepper. Ross was known for his identification and explication of the fundamental attribution error and for the demonstration and analysis of other phenomena and shortcomings that have become standard topics in textbooks and in some cases, even popular media. His interests included ongoing societal problems, in particular protracted inter-group conflicts, the individual and collective rationalization of evil, and the psychological processes that make it difficult to confront societal challenges. Ross went beyond the laboratory to involve himself in conflict resolution and public peace processes in the Middle East, Northern Ireland, and other areas of the world. Life Ross was born in Toronto on August 25, 1942. He earned his B.A. degree in psychology at the University of Toronto in 1965 and his Ph.D. in social psychology at Columbia University in 1969 under the supervision of Stanley Schachter. His primary interests include biases in human inference, judgment, and decision-making; intergroup relations and dispute resolution; political psychology; and points of contact between psychology, law, and ethics. Ross first came into prominence in 1977 when he coined the term "fundamental attribution error" to describe the finding that people are predisposed towards attributing another person's behavior to individual characteristics and attitudes, even when it is relatively clear that the person's behavior was a result of situational demands (Ross, 1977; This effect is closely linked to, but somewhat broader than, "correspondence bias" identified by Jones & Davis, 1965). With Robert Vallone and Mark Lepper he authored the first study to describe the hostile media effect. He has also collaborated with Richard Nisbett in books on human judgment (Nisbett & Ross, 1980) and the relation between social situations and personality (i.e. "the person and the situation"; Ross & Nisbett, 1991). His 1977 chapter, on "The Intuitive Psychologist and his Shortcomings" has been one of the most cited articles in social psychology over the past four decades. Author of over 100 journal articles and book chapters, Ross, co-authored two influential books with Richard Nisbett: Human Inference (1980), which deals with the tasks, strategies, and shortcomings of the intuitive psychologist