Answer: The Great Awakening of Suppressed and Exploited people against the powers that have kept them in Subjugation.
Step-by-step explanation:
Kwame Nkrumah who was one of the most outspoken African leaders in the fight against Colonialism said in his Autobiography that the most significant happening of the 20th century was the realisation by the exploited and suppressed of their oppression and rising against it by seeking independence from Colonizers who unfairly bound themselves to another country to gain Economic advantage from them.