Answer:
Islam chiefly changed over time by becoming more complicated. It has spawned a variety of sects based on a conflict over the nature of religious authority. It has embraced mysticism while becoming more intolerant of rational thought.
The Islamic World or region has gone from being arguably the cultural jewel of the world to a fanatical backwater noted for poverty, xenophobia, political repression of women. It ranks unfavorably with backwards regions like Latin America in global comparison. This has naturally impacted Islam as a religion to its detriment.
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