the countries most likely to survive are those which are already structured for poverty. america is not. without wages to purchase from a restless supply chain, american can't even eat. you could have national guard protect power facilities and the lights stay on, but no food can reach city centers and then with the resultant social chaos, literally no ability to restore order and solve the problem and a social cascade where millions try to flee cities but have nowhere to go and no supply chains or support lines to facilitate their flight. people stranded, walking a few dozen miles down interstates, out of food and hope, gangs roaming through looting and shooting.
United States