Memoirs of Extraordinary Popular Delusions and the Madness of Crowds, Volume 2
Author: first_name:  Charles
last_name: Mackay
Language: English
Year: 1852

"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 reading the history of nations, we find that, like individuals, they have their whims and their peculiarities; their seasons of excitement and recklessness, when they care not what they do. We find that whole communities suddenly fix their minds upon one object, and go mad in its pursuit; that millions of people become simultaneously impressed