The border in the east Europe is strange, especially those countries between Germany and Russia. What's more, the Middle Asia is also very strange.
I think the most possible situation is that Russia was extremely powerful and conquer all Poland (on this map) in history, but finally break up into small pieces. This is the only way to explain these borders. However, I still can't understand why some borders are so strange, like the city of Königsberg belongs to Russia, not Poland or Lithuania.
The straight borders in Africa and middle east shows that they are former colonies. But Saudi Arabia as a rising regional power…… WTF?!