Though Islam is now a global religion, it is a valid point to mention that it always looks back to its roots, hence why the quran is only truly valid when read in arabic and why muslims always pray facing a certain direction.
The curious thing with the relative histories of religion is that Christianity was born into persecution, and lost it's way massively when it became a global power. Islam was born into conquest and war, and is now struggling with persecution, and finding it can't operate as it did when it started, because of the level of resistance that it understandably experiences.