George Marshall
There are many parts of Europe that are developed. You may be thinking in terms of western Europe being more developed that eastern Europe, but it would not be true to say that eastern Europe is not developed.
Roman empire collapsed
After the Roman Empire Collapsed
Eastern Europe is 'poorer' than western europe, during the war they were helpless and were taken over by Germany or the Soviets, with the fall of both empires countries taken by Hitler and Stalin suffered and were left to fend for themselves. The countries in the East have started to pick themselves up in the recent decades and they each support their neighbours,places like Azerbaijan are not as poor any more and it fact some of the more developed cities can be found in Eastern Europe.
That question is impossible to answer. It would total billions over history.
Eastern Europe in general remains less developed than Western Europe, which is a lingering consequence of the Cold War. Probably the single least developed country in Europe is Albania, which is north of Greece.
because they have many other resources
Western Europe is very highly developed and industrialized. It has been a population hub for centuries and people have been migrating to this area for a better life.
Because they r poor
church
The culture of Western Europe is described as Western Culture. It is regarded as a highly modernized and developed culture, with much freedom per average citizen. Western culture can be found in Western Europe, Northern America, Israel, Australia, New Zealand, and even Japan.
It is told that china developed independence from the bronzework. This gave them a lot more more independence.