Deletion of Patterns of Civilization

Comment: the one source I could find is fascinating; http://www.badgerinstitute.org/BI-Files/Reports/Vol15no4.pdf this piece of mind-bending hysteria from the Wisconsin Policy Research Institute. It does a good job of breaking down the textbook itself, and the manner in which the book presents information for students (its probably enough to be considered |significant coverage ''of'' the book, rather than ''by'' the book). But hot-damn... it is so outrageously biased I'm having trouble seeing how we could ever consider it a |reliable source, despite the manner of its publication
Stance: delete
Cited policy: Wikipedia:Notability (WP:SIGCOV||WP:RS)