[true_religion]

Keanu was born in 1964. I believe the rule at the time was that you needed to be born to a US mother in order to automatically have US citizenship at birth. Otherwise you needed to go through a processes.

No doubt this was to avoid having all the children of anyone a US serviceman interacted with abroad claim US citizenship.

[Question50]

No, though that was the case pre-1934 [1]. Remember that Hawaii, where his father is from, didn't become a state until 1959 and there are physical residence/presence tests required to pass on citizenship[2]; ex:

"A U.S. citizen may have automatically acquired U.S. citizenship based on birth in the United States, but never actually resided in the United States. This U.S. citizen will not have established residence in the United States, and may be unable to transmit U.S. citizenship to his or her own children."

[1] https://en.wikipedia.org/wiki/Birthright_citizenship_in_the_... [2] https://www.uscis.gov/policy-manual/volume-12-part-h-chapter...