Folks make big, sweeping statements all the time, so I gotta ask: what do you base this on?
Do you have some inside information that others lack?
Do you possess knowledge that others do not?
I ask this because your comment is very, very optimistic.
I foresee *major* problems in impoverished and/or congested urban areas -- and yes, mobs will go out into the suburbs and further out; being attenuated by a number of factors over time and as they spread out.
And forget about being someone with a chronic illness dependent on drugs. You're scewed.
I say it for a few reasons. Folks out in the country typically prepare for emergencies. Usually have their own water sources, able to hunt, fish, grow veggies, forage, own poultry and or other livestock. Many around our parts own horses...more than one, typically have fuel sources such as farm diesel and or wood to burn.
Urban folks will be in a world of hurt. Country folks know one another and are more likely to ban together to protect swaths of territory against outsiders.
The lakes in our area for fishing, ferrule pigs, garden, chickens/eggs....folks in this area would be just fine, for a while anyhow.