After the Japanese bombed Pearl Harbor
Britain, France and Russia before World War 1
The following classes were common in early civilizations:
Rulers, Priests, Merchants, Farmers, Artisans, and Slaves
One such event would be the famous March on Washington, which took place in 1963 and included a speech by Martin Luther King Jr. It showed that African Americans were taking matters into their own hands when it came to obtaining jobs and freedom.