BETWEEN the Sahara and the Union of South Africa lies Tropical Africa, where a quarter of a million whites rule 150,000,000 blacks. Ethiopia and tiny Liberia are its only independent states; the rest (some 6,500,000 sq. mi.) is ruled by four European powers: Britain, France, Belgium and Portugal.
The Gold Coast (pop. 4,000,000), named by its Portuguese discoverers, is Britain's pet colony (see cover story).
Nigeria, larger than Texas and Oklahoma combined, is Britain's most populous (30 million) colony. It is driving hard for self-government (the British governor holds veto powers, but Nigerians, 95% of them illiterate, have elected their first "national"...