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Anonymous Tue 26 Jan 17:16:37 2021 No.12630674 View Reply Original Report

Quoted By: >>12630839 >>12632320 >>12632325 >>12632378

What evolutionary advantages does left handedness confer, either due to handedness itself or the underlying cause of handedness? Why are humans mostly right handed, but still support a sizeable population of left handed people?

Anonymous

Anonymous Tue 26 Jan 2021 17:44:48 No.12630839 Report

Quoted By: >>12630878 >>12633523 >>12633890

>>12630674
There's none
Evolution just finds a way to make people more diverse in more ways than 1 just in case

Some people have organs pointed to the left
Some have extra bones
I had only 2 wisdom tooth
And there's blood types

Most of evolutionary traits are useless but not harmful. It's just there waiting for the day to be come useful

On the other hand: the evolutionary traits that are harmful are the ones that outgrew their purpose like the apendix, wisdom tooth, and feet pinkie

Anonymous

Anonymous Tue 26 Jan 2021 17:53:38 No.12630878 Report

Quoted By: >>12630938 >>12631071 >>12633894

>>12630839
Yes, but in different animals there are different ratios of right to left handedness when compared to humans. For example, wild chimpanzees are ~66% right handed, while humans are ~85-90% right handed. Clearly there must be a selection pressure here, no?

Anonymous

Anonymous Tue 26 Jan 2021 18:09:29 No.12630938 Report

Quoted By: >>12633894

>>12630878
>Clearly there must be a selection pressure here, no?
In the past left-handed people were considered children of the devil or something like that, and children were taught to write using the right hand regardless of whether it was their dominant hand or not.

Anonymous

Anonymous Tue 26 Jan 2021 18:27:18 No.12631007 Report

Quoted By: >>12633363

Evolution likes to try things out to see what happens. Since the world we live in is constantly changing, evolution needs to keep trying some things out over and over again because at some point, being a lefty might confer some sort of advantage. We are Guinea pigs, which can be cruel on an individual level, but is good on a species level. We likely have many traits that once upon a time were not advantageous but at some point in our history, the trait eventually gave some person and later group an advantage. If that trait had only been tried out once instead of over and over again, it might missed the window where it started to be advantageous to have that trait. Who knows, maybe we have start to inhabit space or other planets, left handedness might be for some reason useful there.

Anonymous

Anonymous Tue 26 Jan 2021 18:39:35 No.12631071 Report

Quoted By:

>>12630878
Most of evolution is driven by random non-selective forces

Anonymous

Anonymous Tue 26 Jan 2021 23:17:09 No.12632320 Report

Quoted By:

>>12630674

https://www.youtube.com/watch?v=TGLYcYCm2FM

Anonymous

Anonymous Tue 26 Jan 2021 23:18:16 No.12632325 Report

Quoted By:

>>12630674
Is it true that left handed people use more of their right brain and are more creative or is that popsci

Anonymous

Anonymous Tue 26 Jan 2021 23:32:38 No.12632378 Report

Quoted By:

>>12630674
left-handedness is a result of increased brain flexibility, and has nothing to do with the hand itself. right-handed people are more rigid, with specific regions doing specific tasks, whereas left-handed brains tend to be more fluid, with different regions doing different tasks at different times. the left-handedness is simply a result of the handedness aspects of the brain being controlled by an abnormal section of the brain.

Anonymous

Anonymous Wed 27 Jan 2021 06:05:27 No.12633363 Report

Quoted By:

>>12631007
Like redheads...our time is coming and the wrath...oh yes

Anonymous

Anonymous Wed 27 Jan 2021 07:32:31 No.12633523 Report

Quoted By:

>>12630839
>the evolutionary traits that are harmful are the ones that outgrew their purpose like the apendix, wisdom tooth, and feet pinkie
None of those are useless.

Anonymous

Anonymous Wed 27 Jan 2021 11:07:37 No.12633890 Report

Quoted By:

>>12630839
I had only 2 wisdom, Tooth!

Based Cleric putting a drood in his place!

Anonymous

Anonymous Wed 27 Jan 2021 11:10:19 No.12633894 Report

Quoted By:

>>12630878
It could be due to said selection pressure as stated by >>12630938
However I would like to add that it simply could just be a case of genetic drift coupled with said selection pressure

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