The document discusses the phenomenon of groupthink and how it can lead groups of intelligent people to make poor decisions. It defines groupthink as a deterioration of thinking caused by group pressures. It identifies faults like lack of procedures, isolation, homogeneity and lack of impartial leadership that can enable groupthink. It also outlines three signs of groupthink: overestimating the group's power and morality, closed-mindedness, and pressure to conform. Finally, it provides tips for avoiding groupthink in strata management decisions like finding impartial management and embracing diversity.