If a group does not reach a unanimous decision but most people agree, what have they achieved?

In a situation where a group does not reach unanimous agreement but there is a significant majority in favor of a decision, they have achieved a majority rule. Majority rule is a decision-making process where the preference of more than half the participants becomes the binding choice, reflecting the views of the larger group rather than a consensus where everyone should agree.

In contrast, groupthink refers to a scenario where the desire for harmony or conformity in the group results in irrational or dysfunctional decision-making outcomes. It usually leads to a consensus that may ignore alternative options, but it doesn't fit the description provided since there's no unanimous consensus.

Consensus signifies total agreement among all members, which is not the case when only a majority agrees. Voting can often lead to majority rule, but it doesn't specifically capture the result of the group's discussion process leading to the decision.

Therefore, in this context, majority rule is what represents the situation where most individuals agree but not everyone.