Have a place all ready to disappear to.

It'll devolve into city states fighting other city states like ancient Greece,or the First nations tribes before the white man-tribes fighting tribes for food and resources(similar to the city states) and also similar to the early european neolithic village states raiding and fighting other villages outside their alliances,especially in the autum when winter stores can be plundered leaving the losers to perish.
There were no such things as countries back then.