Ann Coulter’s latest book
Demonic references a 1896 book by Gustave Le Bon called
The Crowd: A Study of the Popular Mind.
If you’re reading or listening to Coulter’s book, you may want to read the Le Bon book which is online for free
in HTML at the University of Virginia, and
in PDF courtesy of McMaster University in Canada, and in
EPUB and Kindle formats from Project Gutenberg.
I should point out that the French Revolutionary mobs Le Bon was talking about were monocultural–in those days, France was occupied entirely by the French.