There are mutterings and ruminations over in the "Russian Troop Movements ..." thread about the global impact that control over grain/plant oil sources will have, and a few have considered the specific effect on Africa.
Not wishing to drift too far in
that thread, it may be appropriate
here to bring an old film to the attention of readers;
The March 1990:
"A group of several thousand Africans migrate westward across northern Africa and sail across the Strait of Gibraltar to Europe."
The March: Directed by David Wheatley. With Malick Bowens, Juliet Stevenson, Joseph Mydell, Dermot Crowley. A group of several thousand Africans migrate westward across northern Africa and sail across the Strait of Gibraltar to Europe. Their message is: "We are poor because you are rich."
www.imdb.com
It turns up from time to time on youtube and other such media sharing platforms Be sure that it is the one directed by David Wheatley from 1990, as the title has been used many times over the years.