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C4 Diesel Where exactly do you "teach this stuff to kids"? I want to avoid it like the plague when I start a family.
There are at least five (not 3) conditions that must be met for evolution not to occur in a population.
1) Infinite population size. Eliminates evolution from genetic drift.
2) Isolated Population. Eliminates evolution from gene flow from a population with a different genetic structure.
3) Random Mating. Eliminates evolution due in heterogenous allele distribution within the population.
4) No mutations. Guess.
5) No selective pressures. Eliminates evolution due to natural, sexual, etc. selection.
Intermingling of races does result in evolution (#2). The introduction of the alleles for caucasian features into an african population will indeed change the genetic structure of the poulation (mainly by introducing and increasing the frequency of the alleles for "caucasian traits").
I'm also mystified why people think that because humans aren't being eaten by bears or starving to death at the usual frequency, that there are no selective pressures. Humans are not adapted to living in a mordern urbanized environment. Either we'll fail as a species to maintain modern urbanized environments, or we will evolve to continue living in them.
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Simple Machines in Higher Dimensions
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