Karen Blixen's evocative 1937 memoir "Out of Africa" was about the British Empire's experience in Kenya at the beginning of the 20th century, when European powers were scrambling to consolidate colonies across the massive landmass of Africa. Over the ensuing century, Africa has gone through massive decolonialization, a population expansion and enormous turmoil.
Recently, U.S. involvement, while episodic at best, has at least helped contain the rise of violent extremism. But the U.S. is now considering withdrawing much of its military and intelligence capabilities in a shift designed to free up resources for a renewal of "great power competition." This potential move out of Africa is a mistake, and we should examine the reasons for a sensible level of U.S. security involvement on the continent.
The size and scale of Africa are important to understand, as are its economic and demographic growth. The continent is huge — you could fit China, India the U.S. (minus Alaska) and Western Europe into it comfortably. It is a continent rich in diamonds, gold, rare earths, excellent farmland, and other natural resources including oil and vast, flowing rivers.