Diseases introduced by white settlers.
The main reason for the wipe-out of Native Americans was the threat of the diseases introduced by White Europeans. This ended up killing many Native Americans across different tribes, as they had no immunity to these diseases and had never dealt with these kinds of illnesses before. This was a rampant problem and attained the Native Americans quickly after the European settlers arrived.
The 1990s. The internet became widespread
The 24th Amendment prohibited poll taxes or other taxes as qualifications for voting.
Poll taxes had been a way states had discriminated against black voters, by using their lower income status and poll taxes as a way to prevent them from going to the polls. During the civil rights movement of the 1950s and 1960s, this was challenged. The 24th Amendment, ratified in 1964, said: "The right of citizens of the United States to vote in any primary or other election for President or Vice President for electors for President or Vice President, or for Senator or Representative in Congress, shall not be denied or abridged by the United States or any State by reason of failure to pay any poll tax or other tax," and added: "The Congress shall have power to enforce this article by appropriate legislation."