The ice core data also support that the onset of an ice age is rapid. I'm glad I won't live to have to cope with it.
Food production will rapidly decline. Glaciers don't come as far south as Colorado (mountain glaciers excepted) but this land will be useless. Weld County, Colorado, is one of the most productive agricultural counties in America. Next ice age, it will be tundra. Great Plains agriculture will be lost. Populations will flee south and there will be great wars over the reduced livable land.
If only the warmist fantasy was true.