[morbicer]

Just open Wikipedia man. It has citations to primary sources.

"Although the 18th century was a period of increasing prosperity, the benefits were distributed unevenly across regions and social groups. Those whose income derived from agriculture, rents, interest and trade in goods from France's slave colonies benefited most, while the living standards of wage labourers and farmers on rented land fell."

Same for Arab spring, it's like second sentence on the wiki. It's also heavily about corruption, but guess what, those two go hand in hand. Open maps for corruption and Gini index and you will see strong correlation.

Of course there are more reasons. Society is complex.