two-thirds of the USA would immediately be made uninhabitable.
(Excerpt)
Pretty sure 2/3rds of the lands coming uninhabitable would kill more than a few million.
The initial deaths would be the result of poisonous gases and lava of course. But huge ammounts of ash would cover the other areas, rendering them useless for almost everything. Wouldn’t kill everyone right away but starvation would be a sure thing. Make no mistake, a full on eruption of Yellowstone has happened before and they know what it did. It will happen again and when it does it will be devastating. We can only hope that it’s not for another 1,000 years but one never knows.