Depression is a mood in which the person beings to feel a drop in their happiness or in their motivation to do things. This mood affects many people and in most cases depression can be a very serious problem which can end up rendering a person useless in a job, or in their home lives. Some people have eventually faced suicidal thoughts or tendencies while struggling with depression. This mood is very stressful not just for the person who suffers from the depression but also for the people whom are surrounded by the person who is suffering.
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.
Islam promoted trade between West Africa and the Mediterranean. The religion developed and widened the trans-Saharan Caravan trade. The trade enriched the West African and the Muslim traders. Muslims from North Africa came in their numbers and settled in the commercial centres.