When scientists have examined teams in other contexts, such as business or the military, they’ve noticed that the more cohesive and positive a group perceives itself to be, the better it will perform in many respects—from meeting sales goals to sharing information to fostering individual acts of battlefield bravery. But where does this cohesiveness come from? And beyond that, is cohesiveness the thing that causes a team like the Celtics to become successful, or is it a by-product of success?
