Monday, June 15, 2015

Survivability of Hereditable Diseases in Wild Humans

Humans are animals, and this means that the traits that have survived up to modern times may have had some sort of advantage that they provided. This would also include heritable illnesses.

A common example of this is sickle-cell anemia, where being recessive causes an immunity to malaria. Even things that one would not expect to provide a natural advantage may actually provide some sort of benefit to survival, as these traits have survived and been passed down through generations of wild humans to eventually be still present and fairly common in modern humans.

Depression could make one prone to a more sedentary lifestyle. This would provide an advantage towards the transition between a roaming nomadic people into a people that occupies a given area without wandering as much. The depression keeping people disinclined to move about or otherwise wander around. These people could have been the original beacons of a community composed of a set collection of individuals, rather than an odd collection of wandering apes that may randomly see and interact with each other as they wander around in search of their own independent goals.

Schizoid type illnesses provide a paranoia that could give one heightened instinct to search for predators and a more sensitive adrenal system that would provoke the fear response more readily.

Anti-social disorder could provide the person with the ability to establish dominance by being more ruthless in their treatment of the fellow members of the community.

Mild Mental retardation could provide a clearer sense of one’s instincts allowing one to focus more on survival, rather than become involved and consumed by things like social elements that could distract a human from providing for their basic needs. These people could also be less prone to being consumed by competition with other humans for dominance, and less prone to violent contests that accompany this desire for power amongst other humans, making them less of a target when humans do inevitably contest each others dominance and domain.

Pygmies, dwarves, and midgets could have been able to utilize smaller natural shelters, which would be more abundant than others. This small size would also allow them to reside in trees more easily, as smaller branches would be able to support their weight, and these people could then escape many predators this way.

Nearsighted people would have more focus directed towards things that are closer to them, allowing them to identify things such as plants more readily and accurately, as these plants would naturally occupy more space within their field of vision as the person would have to be closer to it to identify it.

Farsighted people would have a greater ability to detect predators and locate food sources.

Becker Muscular Dystrophy often does not effect the legs enough to cause the person to become wheelchair bound until their mid-twenties, and with a common life expectancy of around 30 or 35 years in a wild human, these people would appear to be rather normal to most others.

Huntington’s Disease also does not affect many people until their 30s and 40s, so this disease would not have limited the success of wild humans as their life expectancy meant they would be dead before they would become afflicted by the symptoms of this disease, allowing it to continue to be spread though bloodlines.

Some inherited diseases are recessive, and these can be carried easily by carrier parents. These diseases would not in particular have an inherent benefit, as they could easily induce death in the afflicted child, but they would still be passed on by the unaffected children that are carries of the disease.

High blood lipids could be advantageous when the human is in an area with low lipid intake, so preserving these in the blood can be advantageous because their natural intake is so low. This would be more beneficial than expelling them when the human could easily face a long period of time with insufficient lipid intake.

Phenylketonuria could perhaps have roots from areas where there was little phenylalanine in any parts of the diet, but plenty of tyrosine; and converting any of the little reserves of this into tyrosine could cause unfavorable deficiencies of phenylalanine.

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