May be it is related to the heart position somehow, but i am not certain about pre-history, i don't have too much information about it.

Sorry to disagree with Vitaly and Voloshin, you question my hypothesis but do not formulate yours. It is not necessary to be smart, that not knowing medicine you may realize that many people die with serious injuries in the left side of the chest

Zeiri, with respect to PreHistory, even I am not certain about Pre-History but have you seen that shields are ALWAYS hold with the left hand TO PROTECT THE HEART?

More opinions ! I want to see the point of Neuroresearcher, Anthropologists, Historians and more specialists. This is a NON SOLVED issue.

it makes sense to me Sir Fuente-Calvo. I am following ur update about this issue.

Cảm ơn, bạn bè, là một vinh dự nhận được một lời khen từ một đồng nghiệp Việt Nam.

Dear Le: I do not know vietnamese, theonly word I knew was Cam on ! but I wanted to be polite and grateful.

I accept and respect ALL the points of view, I know there is not enough information, but what is your opinion and what has been found about that.

I was born and I am left-handed and many people look at us as "ET". No way, we survived in the world of the right handed people. Would you (right-handed) survive in "our world"? NOBODY know because that world does not exist.

And this phenomenum of about 4-5% left handed people is world wide: look at the watches, the doors, the zippers in the pants for men, the stick for manual cars in the right, even the keyboards of the PCs, appliances as microwaves, opening the fridges, the individual chairs in the schools, even the paper applications, ALL ! for right handed.

Could this be considered a discrimination? ( I am teasing). We ARE a MINORITY nobody speak about !!!

Do you IMAGINE, a movement fighting for the rights of the left-handed?

Who has spoken about that? Am I the first?

Hello fellow left-handed - Fermin,

Well, I am a left-handed - and I remember Dad telling me that my maternal grandmother wanted to tie up my hand so, I will be forced to use the right hand, and Dad stopped her from doing this... it was considered evil to use your left hand!?

But, anyways the literature is rich with evidence that those individual are SMART!? I am not sure if this is what is the case to date.

I totally agree with discrimination against the left handed - we have a very nice knife in the kitchen with a pink colour - from a very good brand, but I cannot use as it is for right-handed people only.

Let us start the campaign.

Thanks and regards

Theodora Issa

I’m an archaeologist and left handed. In my opinion, the question of handedness might be influenced by cultural variation, rather than as a simple correlate of brain lateralization. For example, in conservative oriental societies, social stigma is associated with being left-handed... Many archaeologists reported that there is an evidence for right dominant lateralization among prehistoric hunter- gatherer populations (see the link below). Besides, Stock and al, 2013 (see the attached file) demonstrates that from an evolutionary perspective (study of apes, prehistoric and modern human skeletons) hunter–gatherer groups show greater lateralization of the right humerus even if the relationship between internal (biological) and external (cultural) factors is highly complex.

http://centraltag.wordpress.com/call-for-papers/the-origins-of-language-and-right-handedness/

The attached file.

Sir Fuente-Calvo,

I am so glad to see your comment in Vietnamese. Thank you for kindness.

It's my pleasure to be your friend.

Hope to keep the contact with you.

It sounds logical to me. But probably left-handed people shielding less vulnerable right side were just removed from genetical line by accidents during hunting and fighting. Although I am born right handed when it comes to any manual work I am considered as left-handed and on both hands.

I am right handed, but agree with most of the opinions that most of the facilities nowaday are suitable for right handed and not left handed peoples. I think this is not discrimination, may be careless of the product companies or unintentional mistakes or they thought that most of people are right handed. Best wishes for everyone especially left handed people. TQ

Researchers claim that we - left-handers - have an advantage when learning languages (or at least we learn differently) because we use both hemispheres of our brain compared to right-handed who use only the left hemisphere. This is not always true (meaning that some left-handers use dominantly the left hemisphere as well) but it is more likely. Being bicerebral is also applied in other activities. Besides, left-handers are more likely to have divergent thinking. Discrimination is not always a negative thing.

Here is an article which explains why left-handed people are rare [a high degree of cooperation has resulted in a right-handed majority] - http://www.livescience.com/19968-study-reveals-lefties-rare.html

and here is one on the association of left-handedness and mental health [higher propensity for stress, depression, more serious mental diseases]

http://www.everydayhealth.com/healthy-living-pictures/little-known-facts-about-lefthanders.aspx#

In my humble opinion, it is a matter of habit because I , myself, provide an evidence. When I entered school as a child in my first elementary class, I used to write with my left hand. A team from the Health Department came to the school to give the usual injections for children. They ordered all of us to expose our left hands to get injected there. Afterwards, I felt pain in the hand & it became swollen so I was compelled to write with my right hand & became used to it until my this old age. The irony is that I still use my left hand for cutting fruits or vegetables also because of continual habit.

Maybe handedness is a property that is

decided by rolling the dice, with a ratio

that turned out to be optimal.

http://www.nature.com/hdy/journal/v112/n3/full/hdy201393a.html

http://www.eurekalert.org/pub_releases/2014-07/uov-mlm070314.php

Regards,

Joachim

Fermin, the logic sounds reasonable,

Subhash