Historians often compare the American Civil War with bourgeois democratic revolutions. Why do you think?

Because capitalism destroyed any institutions that hindered it, including slavery. Underdeveloped capitalism at first relied on slavery, but, having matured, eliminated it.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.