Why is it so hard for Africans to visit other African countries?

Africa's country borders have been introduced only in 1885 with a European ruler drawing straight lines across this beautiful and diverse continent. Africans used to travel easily before introducing country borders, they already had their own system of passports [1]. Nowadays its their greedy "modern dictators", as an African friend calls them, which welcome Europeans with a handshake and treat their own citizens poorly.

Last Sunday, Paul Biya had been elected to prolong his 36 year-long democratorship in Cameroon. How is that possible you ask? Ask European and Chinese politicians and companies which have a high interest in continuing to exploit Africa's rich resources.

[1] Sample pictures: https://www.liveauctioneers.com/item/56272549_group-of-ancie...

Something tangential that most people done know about slavery- the actual enslavers were blacks who then sold to my forefathers- Arabs (sorry!) and then to whites.