Final answer:
The dangers of the Bay of Pigs invasion by President Kennedy and his advisors best exemplify the risks of groupthink in decision-making.
Step-by-step explanation:
The ill-fated decision of President John F. Kennedy and his advisors to invade Cuba is best illustrated by the dangers of groupthink. This term refers to the phenomenon where a group of people in a cohesive in-group, such as Kennedy's Executive Committee of the National Security Council (ExComm), tend to conform to a consensus view without critical reasoning or evaluation of alternative ideas. In the case of the Bay of Pigs invasion, it became evident that the advisors failed to adequately assess the repercussions of the invasion and overestimated the likelihood of a popular uprising against Fidel Castro, illustrating the peril of not thoroughly examining a nation's internal dynamics before decisive action.