GASP! She (or her co-author) may have cut and pasted from Wikipedia.
Oh, the humanity!
"...five sections that he said were lifted from widely available sites including Wikipedia and news reports."
"In a review of the book, The New York Times found that none of the passages in question took the ideas or thoughts of another writer.... Instead, the sentences copy descriptions of programs or statistical information that appear elsewhere."
"The passages called into question by Mr. Rufo on his Substack platform involve about 500 words in the approximately 65,000-word, 200-page book."
For those keeping track, that's 5 instances averaging 100 words each, from public sources, mostly stats or descriptions of programs.