Booker T. Washington noted that the black population of the U.S. was close to that of Mexico. This was in 1899, in an article in Atlantic Monthly. Actually 8.8 million.
This aroused my curiosity since Mexican population is now almost 120 million, and black US population is nearly 40 million, so the rates of increase differ. The US demography post in wikipedia notes the US almost quadrupled its population since 1900, which puts the black increase in line with the overall increase. The Mexican increase was over 8 times.
From wikipedia: "In 1900, the Mexican population was 13.6 million.
During the period of economic prosperity that was dubbed by economists
as the "Mexican Miracle", the government invested in efficient social
programs that reduced the infant mortality rate and increased life expectancy. These measures jointly led to an intense demographic increase between 1930 and 1980."
Is that an explanation--Mexico improved its social programs more than the U.S. did over that period? Or was the reproduction rate for the US lower because it was wealthier, even though we're talking about the poorer segment of the US population?