Civil War killed off slavery and declined the southern economy it also acted as a catalyst to make America into a complex industrial society of capital, technology, national organizations, and large corporations.
Chief Justice Earl Warren said that all citizens have right to public education and should have equal access to it.
He stated that state laws that established separate schools for African-American and white students denied equal educational opportunities and and established that "separate educational facilities are inherently unequal".
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After the war began, German foreign policy aimed to strengthen existing alliances, build new ones, and obtain the cooperation of its allies and of the nations it conquered not only in Germany's war effort but also in its racial policies, especially the annihilation of the Jews.
Answer:
Well based on the fact that the very first patented rock crushing machine was made in the year 1830, and the first successful, Eli Whitney Blake's, was in 1858, I'd say the development process was around 30 years.
