Provide an example of when there was a change in leadership due to a political revolution. Explain why this change in leadership occurred and who benefited from the change in leadership.

After decades of stagnation and stagnation, unexpected outbreaks in more than one Arab country, popular revolutions overthrew regimes, shook the throne of other systems, and created a new reality at the political and social level was not quickly formed and the depth of the changes to notify the most optimistic observers, in late 2010 The beginning of 2011 erupted a wave of revolutions and protests across the Arab world began with Mohamed Bouazizi and the Tunisian revolution, which sparked the spark in many Arab countries and known that period in the Arab revolutions. One of the reasons for these sudden protests is the spread of corruption, economic stagnation and poor living conditions, as well as political constraints and overall poor conditions in the Arab countries.