The Arab Spring (Arabic: الربيع العربي‎ ar-Rabīʻ al-ʻArabī), also referred to as Arab Revolutions (Arabic: الثورات العربية‎ aṯ-'awrāt al-ʻarabiyyah), was a revolutionary wave of both violent and non-violent demonstrations, protests, riots, coups, foreign interventions, and civil wars in North Africa and the Middle East that began on 18 December 2010 in Tunisia with the Tunisian Revolution. (Read the rest on Wikipedia)

Protesters in Tunisia (January 2011) (Source)

Arab Spring pro-democracy protests (Britannica)

The Arab Spring five years on (Amnesty International)
Social media and the Arab Spring (Sage Journals)
Six talks for thinking about the Arab Spring (TED talks)

Mohammed Mahmud Street Wall. 21 of February 2012 -- Image by M. Abaza (Source)