Generally speaking, with respect to global connections, association with "the European Union" offers the brightest immediate future for many African countries, since this contains many countries as opposed to being a single country.
As I've Researched it was in the 14 Century that it killed 60 percent of Europes Population about 50 million people.
Please correct me if I am wrong.
Hope it helps. Have a great day
They were dependent on one or two crops.