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.