After The Great Famine everything is scarce. Climate change caused the increased demand for energy, which led to the oil and gas running out, which in turn led to the failure of large scale agriculture. The Great Famine caused the population of the world to halve. Rising sea levels changed the coastline, and that meant that some major cities were no longer viable. Populations in general moved to higher ground where they developed a renewed interest in traditional skills and in farming. Old fishing ports on mountainous coasts became particularly popular.
In a post fossil fuel world, a post nuclear energy world, your resourcefulness determines your station in life. No telecoms, no internet, no cars, no aircraft, and scarcely any electricity. Lots of ships and lots of horses. And lots of people with the knowledge of how to use them.
Territories have shrunk. Governments have changed. They’ve downsized and localised, and they are run by the people for the people. In the Post Oil Era there is ample timber in the right places and enough clean drinking water in the right places. However, there's not enough copper. And there's a newfound concern about the welfare of wolves.