Kill a bunch of the population because the global extinction event is going to kill a bunch of the population.
my thought is something bad is about to happen and they dont want the starving people to find a backhoe and tear into there underground bunker to get to the food.
But If the pop is low after the event the bunkers will have enough food for the survivors
In recorded history a volcano erupted and Earth had a full year of winter. if that happens now there would be a lot of hungry desperate people.
https://en.wikipedia.org/wiki/Year_Without_a_Summer
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