> what if Islam had spread throughout Europe? For much of Europe, it did. If you take a look at the maps of various Islamic empires, there remains a fairly sma

> what if Islam had spread throughout Europe? For much of Europe, it did. If you take a look at the maps of various Islamic empires, there remains a fairly small part of Europe that was never ruled by them. Practically speaking, what is called 'Europe' today are just the parts that were never conquered, or were later retaken. The rest we call e.g. Turkey.