Low level of education is generally determined by the way the education system is designed/implemented. Population wouldn't give direct impact to this. Here are how over-population can cause problems on the other options:
- Pollution
Every individuals produce a certain amount of waste from the consumption of their product. The more population exist in a country, the more waste will be created.
- Disease
Over-population often forced many people to live in a cramped/unsanitary areas. This will increase the rate of disease in that area.
- Employment
The increase in potential labor force in an overly populated area often rise faster compared to the increase in job opportunities. This will cause a high amount of unemployment.
it means that there are more people in the society involved in bad works than good works from which humanity decreases and if there is no humanity...no presence of God.
In the Arab world, enslaved people were often European. Roughly 1 million and 1.25 million Europeans were captured between the 16th and 19th centuries by Barbary corsairs and sold as slaves.