The upheaval of the early Twenty-First Century, the socio-political strife and constant warfare eventually broke the larger governments ability to maintain order. Militaries deployed to help maintain order fail in their attempts to end the chaos. Roving bands of gangs in the major cities start attacking the authorties with impunity.
As time goes on, things settle down. While the Federal Governments of the world, the nations have all but dissapeared, smaller local communities have remained intact. In some case, like the Republic of Texas, larger collectives of city-states have banded together to form a new nation. In others, like the Island of Manhattan, there is only constant Gang Warfare.
Some have evolved around political ideologies that are similar to the past, while others have moved in extreme ways along all spectra. This is the story not just of this chaos, but of trying to do the right thing. And trying to figure out what it means to find home.