RE: The U.S. in 2050: Bigger, younger, less white, less urban
I have not read the book but plan to. It sound interesting. According to a 2006 report on the Fertility of American Women (most recent available or that I found) Women 40 to 44 who will end their childbearing will have, on average, 1.9 children, a number below replacement level. However, Hispanic women will average 2.3 children, higher than that of White, Black or Asian women.
The report goes on to say, "Overall, women 15 to 44 years old
in June 2006 had an average of 1,169 births per 1,000 women. Hispanic women aged 15 to 44 had the highest number of children ever born (1,435 per 1,000 women), compared with non-Hispanic White women, who had 1,091 children ever born per 1,000 women; Black women, who had 1,288 children ever born per 1,000 women; and Asian women, who had 992 children ever born per 1,000 women."
Given that the Hispanic population is the youngest group (fact - just look at census data) and most "fertile", stands to reason why some of the assumptions around the rapid growth by 2050 will occur. We are already seeing minority-majority states in Texas and California. Other states will be following closely. I don't envision that less white will necessarily translate to mean non-existent, but the tide is turning and we have to prepare for the consequences, both good and bad.