I know that we are generally less knowledgeable about other continents than our own. I could only name all 50 US states with a lot of time to think about it, though I can name all the EU/EEA/EFTA Member states because of my job. I am almost clueless about the geography of Australia and Canada, though I know the UK and the Republic of Ireland pretty well.
One thing I have noticed across the board though, is that people generally underestimate the size and population of Africa. It is made up of 53 countries, 54 if you recognise West Sahara, takes up 20% of the land area of earth and holds 20% of its population. It population is the youngest. Maps of Africa tend to make it look smaller than it is.
Here are some graphic representations:
This is a map of colonisation. The colonial powers usually left behind much language and culture, long after their departure. Many people do not realise that Namibia was German and that Angola and Mozambique were Portuguese, not British. Liberia and Ethiopia are generally considered to never have been colonised.
I didn’t know that about Liberia and Ethiopia never being colonised. However you look at it, colonisation is never good for the natives. Africans had been enslaved from Roman times right up to the early 20th century. Slavery is never right because no one has the right to own another human being.