I think it was when people would line up at soup kitchens because when people lost their jobs, they didn't have money to buy food. Someone please tell me if I'm wrong.
It would be a "traditional" type of economic system that relies primarily on hunting gathering herding and farming to maintain self sufficiency, since this was how humans sustained life for many years before the modern era.
they explain a the fall of the roman empire
They were ceded by Mexico following the Mexican-American war