Lido

Men, it has been well said, think in herds. It will be seen that they go mad in herds, while they only recover their senses slowly, and one by one.

in Extraordinary Popular Delusions and the Madness of Crowds, de Charles Mackay.

In crowds it is stupidity and not mother wit that is accumulated.

in The Crowd: A Study of the Popular Mind, de Gustave Le Bon