Answer:
people protesting and fighting against harsh and unlawful governments that have suppressed and exploited them
Explanation:
According to Kwame Nkrumah, the most significant happening of the twentieth century is that "people are now protesting and fighting against harsh and unlawful governments that have suppressed and exploited them."
Unlike the previous centuries whereby people still considered it normal to be colonized, Nkrumah observed that people no longer take such a ridiculous position but rather oppose colonialism and now rising against the foreign powers that have oppressed and suppressed them in subjugation
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They were slave states that decided not to join the confederacy and had storng ties to the north.