In the second edition of Rational Choice in an Uncertain World , the authors compare the basic principles of rationality with actual behavior in making decisions. They describe theories and research findings from the field of judgment and decision making in a non-technical manner, using anecdotes as a teaching device. Intended as an introductory textbook for advanced undergraduate and graduate students, the material not only is of scholarly interest but is practical as well. The second edition includes: more coverage on the role of emotions, happiness, and general well-being in decisions; a summary of the new research on the neuroscience of decision processes; more discussion of the adaptive value of (non-rational heuristics); and, expansion of the graphics for decision trees, probability trees, and Venn diagrams.