Sigmund Freud,
Group Psychology and The Analysis of The Ego
“ Inclined as it itself is to all extremes, a group can only be excited by an excessive stimulus. Anyone who wishes to produce an effect upon it needs no logical adjustment in his arguments; he must paint in the most forcible colours, he must exaggerate, and he must repeat the same thing again and again.Since a group is in no doubt as to what constitutes truth or error, and is conscious, moreover, of its own great strength, it is as intolerant as it is obedient to authority. It respects force and can only be slightly influenced by kindness, which it regards merely as a form of weakness. ”

