To [the American slave], your celebration is a sham; your boasted liberty, an unholy license; your national greatness, swelling
vanity; your sounds of rejoicing are empty and heartless; your denunciation of tyrants, brass-fronted impudence; your shouts of liberty and equality, hollow mockery; your prayers and hymns, your sermons and thanksgivings, with all your religious parade and solemnity, are, to Him, mere bombast, fraud, deception, impiety, and hypocrisy – a thin veil to cover up crimes which would disgrace a nation of savages. —Frederick Douglass
Douglass uses parallelism in order to make his speech more attracting and influencing for the people. Parallelism is also known as parallel structure of a sentence. Parallelism provides a phrase with balance as well as also give phrases a pattern and rhythm. This rhythm makes the structure of the sentence fascinating and the audiences enjoys such type of structure of a sentence
I believe this is referred to as the Columbian exchange. A good way to remember this is to recall that Columbus came to the Americas in 1492. Thus, the Columbian Exchange started.
