Everfair by Nisi Shawl

EVERFAIR is a Neo-Victorian alternate history novel that explores the question of what might have come of Belgium's disastrous colonization of the Congo if the native populations had learned about steam technology a bit earlier. Fabian Socialists from Great Britain join forces with African-American missionaries to purchase land from the Belgian Congo's 'owner,' King Leopold II. This land, named Everfair, is set aside as a safe haven, an imaginary Utopia for native populations of the Congo as well as escaped slaves returning from America and other places where African natives were being mistreated.