I think cities but is this about country
They are alpha world cities of london and paris so that would be like mexico city or dublin,vienna,seoul,tehran
For a glacier to grows it takes snowfall at their origin, the snow will get heavier, and the snow beneath it will become dense and become ice.
Italy is surrounded by sea, meaning that there is always accessible trade routes through water. In earlier days, water trade routes became much more popular due to not having to travel through rough terrain. Therefore, the economy boosted as trade increased.