I will use 'The Black Hermit' and 'The Lion and the Jewel' to answer your question.
Literacy or education brought various benefits to Africa. It is through Remi's advanced education (university learning) that the elders asked him to lead their tribe in the political direction. A leader who lacks knowledge in diverse things is incapable of leading a community.
It is through literacy (knowing how to read and write) that African countries are able to interact with foreign nations and with each other. International relations can't exist if people don't understand each other because of a lack of a common language or not knowing how to write or read.
Foreign companies invested in Africa as shown in 'The Black Hermit' thereby leading to the development of the countries in various sectors.
It is through education that Lagos, the capital city of Nigeria is advanced in development in terms of the definition of modern development. This was witnessed by Lankule who wanted to modernize his village. He told Sidi that he will bring machines that will ease work and home and on farms.
Without education, we wouldn't know some African traditions are discriminatory or harmful such as wife inheritance. Even though Thoni loved Remi before she's married by his brother, it was Remi's lack of self-confidence to tell her how she felt about her. He was against wife inheritance but the issue of Thoni's love for him wasn't in any way associated with wife inheritance which is a discriminatory practice.