Saudi has oil money but as the switch to renewables and nuclear happens over the next few decades they will go back to being a desert wasteland if they don’t change their ways.
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The Quran, like the Torah and Bible, is a mythology book. Mohammed was a con man that used religion to consolidate power for himself. Treating him as a religious figure would be like France still ridiculously treating Sun King Louis as a divine leader. One huge obstacle holding back Sharia dominated countries is religion. Rather than focus on economic output real life is disrupted by mythology.