Answer:
Cohesiveness and Solidarity
Step-by-step explanation:
The event that occurs when members of cohesive group are connected with quickly reaching consensus in their decision making without evaluating or critically analysing the ideas jis called groupthink. This term was given by William H. white and was studied by Irving Janis.
Janis analysed various foreign policy disasters such as Bay of Pigs invasion and Japanese attack on Pearl Harbour and found group cohesiveness to be the main cause for these. He found out that cohesiveness of the group and Solidarity among the members to be main group properties for these attacks.