Wiktionary
n. The tendency for groups of individuals to act together without planned direction.
Usage examples of "pack mentality".
Some of them were already drunk, and their body language suggested that many were enjoying their pack mentality.
Imagine such creatures grown to giant size, and possessed of pack mentality.
Under certain conditions, especially when crowded into confined spaces, people reacted with a pack mentality, blindly following others, eschewing individuality.
But he wasn't after a girlfriend to boast about to the lads and he disliked the pack mentality of the sports crowd.
They might not realize it (assuming they would have cared if they had), but his empathic sense made him particularly sensitive to the predatory pack mentality that went with the media's pursuit.
They might not realize it (assuming they would have cared if they had), but his empathic sense made him particularly sensitive to the predatory pack mentality that went with the media’.
They had obviously evolved a kind of group or pack mentality that enabled them to communicate and work together in some fashion, for it was only by such a manner could they have contrived to have held their peace so well while waiting for the party to approach the rock.
A pack mentality ruled them when they found prey, and they would attack and keep attacking until either the enemy or they were destroyed.