In Brazil, the politically dominant rich White class were aware that blacks can be mixed out of existence.
Hence, why Race-mixing was promoted to Whiten the country:
Successive waves of Whitening would ensure Whites remained the dominant race in the country.
It actually worked.
There are hardly any full blacks in Brazil.
"According to another study conducted on a school in the poor periphery of Rio de Janeiro, autosomal DNA study (from 2009), the "pardos" there were found to be on average over 80% European, and the "whites" (who thought of themselves as "very mixed") were found out to carry very little Amerindian and/or African admixtures. "The results of the tests of genomic ancestry are quite different from the self made estimates of European ancestry", say the researchers. In general, the test results showed that European ancestry is far more important than the students thought it would be. The "pardos" for example thought of themselves as ⅓ European, ⅓ African and ⅓ Amerindian before the tests, and yet their ancestry was determined to be at over 80% European. The "blacks" (pretos) of the periphery of Rio de Janeiro, according to this study, thought of themselves as predominantly African before the study and yet they turned out
predominantly European (at 52%), the African contribution at 41% and the Native American 7%.
According to another autosomal DNA study (see table), those who identified as Whites in Rio de Janeiro turned out to have 86.4% – and self identified pardos 68.1% – European ancestry on average (autosomal).
Pretos(blacks) were found out to have on average 41.8% European ancestry."
@Apollo I don't think the pardos would be conidered black, they seem to be 70-80 % European.