The herd instinct may be an explanation of conformity but it does not explain variation.
Probably there is one more fact that belongs under the herd instinct.
Their operation is intensified and regularized by herd instinct.
One side of patriotism—gregariousness, herd instinct—has a socially protective origin, and is probably in some form indispensable.
The herd instinct would appear to be something primary, something 'which cannot be split up'.
Saupe observed a strong "herd instinct" in all age groups of Blaberus craniifer.
Custom is a formidable enemy—that herd instinct of a people which causes it to accept as right the methods of the many.
I do not object to it being called 'the herd instinct,' so long as we realise that it is a metaphor and not an explanation.
The herd instinct in animal species develops packs and clans and tribes and states.
War is the result of the action of the herd instinct in man upon the old instinct of aggression.