Answer:
This phenomenon is known as Groupthink.
Step-by-step explanation:
Groupthink is a phenomenon that happens when a group behaves and acts in an extremely cohesive and harmonious way, reaching the point where a member, or more, of that group cannot express an opinion if it is contrary to the objectives and thoughts of the group as a whole, even if the group's goals and thoughts are incorrect. An example of this can be seen in the question above, where a highly cohesive group gets to make the wrong decisions, because they are stuck in a perspective and do not have the audacity to change their thoughts and ideas.