The correct answer to this open question is the following.
Although the question is incomplete because it does not mention what kind of movement it is referring to, we can assume that it's about the African American civil rights movement in America.
During these movements since the 1890s, there have been legal cases through the judicial branch of government that were used to advance voting and civil rights.
Among the most important cases in this regard, we find the Plessy v. Ferguson of 1896, Brown v. Board of Education of Topeka, Kansas of 1954, Bailey v. Petterson of 1962, and Swan v. Charlotte Board of Education f 1974.
These legal cases were part of the role of the US Supreme Court in a long fight from African Americans' end race segregation laws to be included as normal citizens with rights and obligations. This process also had is sad moments of aggression and violence, but the decisions of the judicial branch somehow facilitated the changes for more real inclusion.
The 1920s were a unique time in the United States in the sense that it was a time of great economic prosperity and also great social woe. What led to this tension was a mix of rising immigration levels and and irresponsible attitude towards money and spending.
Well in the middle ages after the decline of the Roman Empire, people were confused since the government and civilization as they knew it, was gone. Barbarians rule the land now, languages and religion is getting mixed with the savages and Roman citizens. Throughout all this chaos, there is a world wide panic from other countries that are depending on Roman grains and shipments. Allied factions and tribes now starve without the support of the Empire, free roman citizens now slaughtered and violated in the streets, and the worst part of it all is that the barbarians don't know how to live in the roman complex cities they built. All the Aqueducts and sewage systems now forgotten in time, the world everyone knew it, is gone.
The world fell back in time, after the decline in population the world grew back slowly and around 800 AD it started getting better and the growth came back slowly. Since the barbarians that conquered the lands now turn to knights and kings, up rise kingdoms and castles and the population growth slowly comes back.
Monarchy takes over the middle ages...
