In answer to the question that was asked at 1:04:00 I believe one of the push towards diverse texts being used did begin before BLM. The Reflecting Reality reports by CLPE began in 2017, when they reported that only 4% of books published contained a minority ethnic character. The annual research by Farrah Serroukh has been a real catalyst for change in the publishing world and I believe current trends began there. But this work takes time and the gatekeepers have been slow to respond. BLM movement definitely helped to get things moving faster but many schools and particularly librarians had been working on this prior to 2020.