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"OK, here is one plausable and simple explaination."

New Guinea Communities and the Migration Dispersion Model

The origin of the peoples of New Guinea is a subject of dispute among anthropologists. Regardless of their origin, New Guineans in the past have tended to isolate themselves in small groups which have become diversified both linguistically and genetically. R. Daniel Shaw compiled data on the ABO, MNS and Rh blood groups for natives of New Guinea in 37 areas spread over the entire island in an attempt to discover any relationships that might aid in correlating these genetic data, (31) and which might provide some basis for postulating bow these diverse groups arose.

Although the data are insufficient to validate any theory, Shaw maintained that his data supported a Migration-Dispersion model for the origin of these New Guinea population groups. According to this model, as individuals migrate in small numbers from a common gene pool, the new group becomes more distinct than the source group. This is so because new generations come from only a limited gene pool and are isolated from the normalizing effect of interbreeding within a large gene pool where all genetic factors are available. Genetic traits peculiar to the group are thus rapidly and strongly expressed because of a high degree of inbreeding.

It is postulated that "Papua-Melanesians" migrated to New Guinea in relatively large numbers. After settling on the coasts of what was probably an uninhabited island, population growth forced these people to migrate up river valleys and into the highlands. These groups became reproductively isolated from one another due to geographic, linguistic and cultural barriers. This gave rise to populations that were genetically diverse from one another, since each migratory group had carried with it only a fraction of the total gene pool.

While evolutionists generally propose that the origin of races required gradual processes over a vast length of time, creationists postulate that a process similar to the one above could have caused the origin of races in a short period of time. The rapid dispersion that took place following the confusion of tongues at Babel would have resulted in the isolation of relatively small groups. Furthermore, the manner in which God bestowed various languages among this previously monolingual human population may have been so directed as to isolate genetically similar individuals in the same language group.

Thus, those individuals having a higher proportion of genes for Negroid features, or for Caucasian features, etc., may have been given a common language. Once the race itself was established through isolation and inbreeding, further migrations and other isolating mechanisms, such as those described above, could account for the diversity within each major racial group.

are you using evolution to proove the story of the tower of babel in the bible? damn, that's freestyle! this post reminds me of an article that was posted not too long ago, citing remarkable genetic similarities in the welsh, irish and basques. after thousands of years these groups are still genetically identical. this kind of stuff is really interesting to me, but there seems to be suppossed "evidence" from both sides.

In other words you postulate that the several races evolved from the original race over time?

Still waiting for your reply.

It's not that difficult. Some of the creationists believe that a half dozen distinctly different races could EVOLVE from an original race in only 6 thousand years. What kind of changes could we expect over 6 million or 6 billion years?

You don't need to reply. The answer is obvious to all but the blind.