Ask the people in Ukraine, how your world can be turned upside down overnight, right?
Seriously, what if we get 3 or 4 years of crazy weather and really bad harvests globally.
Food prices could triple or quadruple in the US, which will push tens of millions into "severe food insecurity". Across the globe 100's of millions will start starving.
Either there is a coordinated global response to the crisis, OR, there will be WAR.
Hundreds of millions will not "die in place" quietly just because it's convenient for the rest of us. We are now living in a powder-keg whose fuse has been lit.