Let's say Hitler falls down the stairs and breaks his neck over the winter of 1938/39, or something along those lines. An uneasy peace settles on Europe, and war is averted. There may be conflict in the future, but nothing like OTL.
So, what happens to colonial Africa in this world? How delayed will decolonisation be? Will it happen more peacefully? Can the Apartheid regime and some of the other nasty post-colonial ones be averted, or will they be merely replaced by equally horrible dictatorships?