Martin luther king, jr. gave his "i have a dream" speech during what period of u. s. history?

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.

according to howard zinn, the history presents the encounter between columbus and the arawaks as a heroic adventure of descovery but leaves in the shades the cruel slavery and bloodshed columbus led in order to pay back to his investors. he sent the indians back to his nation as a payment, slaved them to find gold in the land and punished them when they didn't find any. history presents columbus as a heroe and even celebrates his day, when in reality he led a genocide. zinn describes the story of the colonization from the arawaks point of view.