How did the invasion of the cotton gin in 1793 affect the use of slave labor in the south

Which of the following was used only once, to ratify the 21st amendment (repealing prohibition)? a.three-fourths of both houses of congress. b.three-fourths of the state legislature approved it. c.two-thirds of the state legislature approved it. d.ratifying conventions in three-fourths of the states approve it.

How did the protestant reformation and scientific revolution advance individualism and liberal reforms?

What problems did socialist thinkers seek to solve