What's old is new again. https://en.wikipedia.org/wiki/Extraordinary_Popular_Delusions_and_the_Madness_of_Crowds https://en.wikipedia.org/wiki/Extraordinary_Po

What's old is new again. https://en.wikipedia.org/wiki/Extraordinary_Popular_Delusions_and_the_Madness_of_Crowds https://en.wikipedia.org/wiki/Extraordinary_Popular_Delusion... Extraordinary Popular Delusions and the Madness of Crowds is an early study of crowd psychology by Scottish journalist Charles Mackay, first published in 1841 under the title Memoirs of Extraordinary Popular Delusions.[1] The book was published in three volumes: "National Delusions", "Peculiar Follies", and "Philosophical Delusions".[2