Pretty certainly all human beings presently alive, ie the "modern" human beings, evolved from the African version of Homo erectus, and spread from Africa across the rest of the world quite recently, replacing the descendants of Homo erectus previously living in Eurasia. For example, following the incursion of modern humans into Europe and Western Asia, the local human type, Neanderthal people, disappeared.
Of all the continents, Africa has by far the greatest genetic variation in its human population. Much more than the rest of the world put together. This can best (or only) be explained on the assumption that the rest of the world is populated by a subset of the original African population.
It's interesting to see racists like yourself making such crude misuse of the multi regional theory, which in itself is not a racist theory, any more than the idea that Europeans made their way into the Americas at an early date is in itself racist. These perversions of scientific hypotheses, like the pseudo-sciences embraced by the Nazis, have a rather disgusting quality.