The concept is clear : After the climatic situation of our planet, humans will be confronted to the rising water.
In this map, many borders have changed. Because in 170 years, countries claims new borders and many war start in all over the world. After this, borders are now fixe. But the water is the now problem. No water in the world. So It's the total wars for it.
^^.
This map it's based on real experimentation if the world will be effectiveness without any glacier. So, we can see this europe :
Europe is finish = 100%, image :
The world map is not finished = 20%, image :
The technology will be the same. Because war, pollution and other problem limit the progress. So we have Tanks, infantry etc... :p