mate but I think it was human then they got conscience and then started building themselves
It caused people to be racist to the muslims.
Since OPEC has influence on member countries' economic growth and development. ... Moreover, despite the existing quotas on oil production, the member countries make benefit by oil exporting. OPEC influence and maintain the prices of oil by controlling the volume of oil production and generate revenue.
The doctrine that allowed people living in the territories to decide the issue of slavery through their governmental bodies was called popular sovereignty.