Building techniques improved, iron became more common, and hydraulics were used to dig riverbeds deeper. So less floods happened that destroyed farms and endangered lives.
The spread of Islam into the Maghreb is an example of Arab invasion of North Africa. The Arabs send Muslim army to Maghreb (modern morocco) to battle against Byzantines and allies, and finally conquer most of the North Africa were many Berbers (locals of Maghreb) join the Muslim army. After Arabs gain more power in the region, the Berbers are now ready to adopt and convert to Islam as well as the Arabic culture.
The supply side supplies the product for us the demand side
Martin Luther King Jr. was a believer of peaceful protest. Every single one of his protestant gatherings were meant to be peaceful. a quote from from one of his speeches shows this:
I have decided to stick with love. Hate is too great a burden to bear.
The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy.
In the end, we will remember not the words of our enemies, but the silence of our friends.
unquote.
This excerpt proves that he was a peaceful protestor.
