Dont' notice the initial fast expansion of Islam into Europe, including Spain.
This map is very selective as it starts in 1450.
The lack of other notable invasions from the East is not clearly identified, yet the later maps for 1925 clearly mentioned European colonisation as being a factor. You can see the huge hit that India suffered as well as the fractionation into different political entities. It starts
|(M. Izady/Gulf 2000 Project)|