The document discusses the concept of groupthink and how groups can fall victim to irrational and dysfunctional decision making in order to achieve group cohesion and consensus. It defines the key symptoms of groupthink, including overestimation of the group's power and morality, closed-mindedness, and self-censorship. The document also provides strategies for preventing groupthink, such as considering alternative options, contingency planning, and embracing whistleblowing dissent. It critiques some aspects of groupthink theory but also notes its heuristic value and impact on the study of group dynamics.