If you have any European ancestry, someone in your lineage had to survive the black death in the fourteenth century, which killed more than half the people on the continent. If you have any Native American heritage, somehow your forebears managed to pass their genes on to you, despite the fact that only 10 or 20 percent survived the microbes and violence brought by European invaders. Whatever your ancestry, the list of wars, raids, plagues, famines, and droughts your genetic material had to overcome is stunning. All this in order to arrive at the moment where you, exactly you, are ready to
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