I'm not sure but extract is a synonym of abstract
Answer:
Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brownv.
Explanation:
The Reign of Terror instituted the conscripted army, which saved France from invasion by other countries and in that sense preserved the Revolution.