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What was John Brown's role in the violence that led to "Bleeding Kansas"?
He killed a group of proslavery settlers near Pottawatomie Creek.
He established a proslavery capital in the Kansas Territory.
He gave "The Crime against Kansas" speech in the Senate.
He pillaged and burned the antislavery town of Lawrence.

for the 2 countries u can do china and america because america has a democratic government while china has a communist government.

a democracy is a government run by the people either by directly voting or indirectly by electing representatives. an oligarchy is a government run by a few or a small group of people. a democracy and oligarchy are similar because both in an oligarchy and an indirect democracy, a small group of induvial determine the laws for a large group of people they are different because in an oligarchy it is easier to control and they do not have to answer to a large number of people in the country, unlike a democracy where they do have to answer to a large number of people an county that is a democracy would be the united states. a country that is an oligarchy would be the china.

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget

i believe george gallup used a poll in 1936