Role of Natural Selection
"Irrationally held truths may be more harmful than reasoned errors."
T.H. Huxley
  • Three types of natural selection are known. Every organism has its own natural environment to live in which proper food, temperature, and air is provided. If the species that required a high temperature was born in a cold climate, then it would not survive, and would be selected out by natural condition. This is known as type I natural selection. This type of natural selection also includes natural events, such as fire, flooding, or earthquake. Any individual could be the target of these accidents. Outcome from this selection would not change allele frequency of population.

Nature disater eliminate many organism regardless of their fitness.

  • In type II natural selection, individuals possessing favorable character­istics will tend to compete more successfully with their unlucky peers. They will have more mating partners and leave more descendants than their less fortunate counterparts. Even if the allele frequency is modified, the less fortunate and their progeny may still survive. The Neo-Darwinists usually consider this type of natural selection mainly lead to speciation. However, this type of natural selection only modifies allele frequencies within a species, and it does not eliminate species or generate a new species.
  • As the space and resources of the environment are not unlimited, occasionally sufficient food might be not available to the whole population. In Darwin’s model, competition for limited resource within and between populations will generate new species because of the survival of the fittest. This is type III natural selection. Type III selection nature can occur theoretically, but very rarely, if any. In the proposed model, Type III natural selection can cause death of certain members within species and never leads to speciation.

The idea of the survival of the fittest was in mentality of many human crimes.

  • In the initial phase, all members of new species are homogeneous, and only type I natural selection functions. When heterogeneity has developed within a species, type II natural selection would occur. Food might never become scarce, even competition might exist, and type III natural selection might never function.
  • In human society, war is usually initiated by conflict of faith, desire to control power and land, and misunderstanding, rather than lack of food. Starvation is usually caused by political reasons, not for lack of natural resource itself.
No evidence in the vast literature of heredity change shows unambiguous evidence that random mutation itself, even with geographical isolation of populations, leads to speciation (Margulis 2003).”

Natural selection leads to adaptation, not to speciation.


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