Final answer:
An overwhelming desire for group harmony typically leads to groupthink, where group consensus overrides individual opinions, potentially resulting in poor decision-making.
Step-by-step explanation:
An overwhelming desire for harmony in a decision-making group increases the probability of groupthink. This occurs when group members modify their opinions to what they believe is the group consensus, often leading to decisions that individual members would not make outside the group setting. Strategies to avoid groupthink include seeking outside opinions, voting in private, and having leaders withhold their opinions until all voices are heard.