That's a hard one to answer but from all my reading it would seem there was one main reason. The Berbers were nomads so they never were able to be collectively together to form an army against invaders. Therefore, the Berbers were constantly being conquered by someone. Each time they had to learn new laws set out by the conquerors. When the Arabs came with their mighty army, they knew they couldn't fight so giving in was in an odd way a protection system of kinds.
c. industries in the West based on available natural resources
Explanation:
The West have sizable quantities of ore and forests, and are used when available and needed. However, this is not too say that rely solely on these two for their economy, but is still a part of it.
