Final answer:
The ancient Egyptian society was considerably affected by droughts, leading to instability, while the 2011 Egyptian revolution was driven by economic strains and political repression, with parallels drawn to the global food crisis triggered by the Russia-Ukraine war.
Step-by-step explanation:
The droughts in ancient Egypt, exacerbated by climate changes, resulted in significant upheaval of the social and political structures. Major powerhouses like the New Kingdom of Egypt had their stability rocked due to shortages in grain stores, triggering a crisis of leadership and social harmony. This trend mirrors the events of the 2011 Egyptian revolution, where economic strain became a central grievance amid already present political corruption and repression. The 2011 protests, part of a wider phenomenon known as the Arab Spring, had their immediate triggers in economic hardships, like those potentially faced due to food price increases influenced by Russia's 2022 war in Ukraine, which significantly disrupted wheat exports and exacerbated global hunger.