What else changed 50 years ago?
Speaking of the 1965 Immigation Act Senate immigration subcommittee chairman Edward Kennedy (D-MA.) reassured his colleagues and the nation with the following:
"First, our cities will not be flooded with a million immigrants annually. Under the proposed bill, the present level of immigration remains substantially the same ... Secondly, the ethnic mix of this country will not be upset ... Contrary to the charges in some quarters, [the bill] will not inundate America with immigrants from any one country or area, or the most populated and deprived nations of Africa and Asia ... In the final analysis, the ethnic pattern of immigration under the proposed measure is not expected to change as sharply as the critics seem to think."
Widespread use of artificial contraception turned those predictions on their heads; even the 2050 date used for when whites become a minority on this country must be based on 1946 birth rates.
For years now the under-20 demographic has been primarily non-white; I use 2020 as a more accurate date for that particular event.