Here's a crazy, conspiratorial idea. No sarcasm intended. I truly believe this is crazy, but since the world is crazy right now, I don't rule it out.

Our "elites" have been talking about population control since the 70s, or earlier. What if Open Borders, which has been explicitly stated by some of them as the entirely free and unfettered movement of goods and people anywhere in the world, is really a condition they wish to create, in order to facilitate the spread of diseases like the bubonic plague, in order to wipe out large numbers of people around the world in short order?

Here's more. It's been known forever that population density in any mammalian species dramatically increases the risk of pandemics. One of the first really noteworthy cases that just about any educated person should be aware of is the Athenian plague. At the start of their war with Sparta, Athens moved all of its people inside of the walls of the city proper. Soon after, a plague broke out, killing 1/3 of all Athenians, including their famous war leader, Pericles.

Well, what is the central directive of Agenda 21? Mind you, doubters, this is an actual UN document. To move everyone into cities and increase population density.

I dunno. But it's quite possible they're really trying to kill us.