If all of humanity died at once, then there would be no wombs and no way to reincarnatesouls here on Earth.
2
The reincarnatedsouls haven't a clue where they are, how they got there or what they're supposed to do next.
3
The ancient Egyptians, Persians, Medes, Chaldeans, Romans, Grecians and many other ancient races have disappeared, but their reincarnatingsouls are with us to-day.