The left-handed natives are distributed in a homogeneous way in all the populations of the globe. Approximately between 8 and one 13 % of the world population it is zurda.1 The studies indicate that the phenomenon is more common in the males that in them mujeres.2 There are more left-handed males (13 %) that women (9 %), without it is known why.
There is thought that the number of left-handed worldwide would be major without cultural pressures; apparently, the half of the population is born left-handed. For it, writing is a precise indicator, since it it might seem, since left-handed many people write with the right hand, forced during his learning for the social pressure, but use the left hand for other tasks, they strike a ball with the left foot preferably, etc.

The percentage of left-handed children proceeding from multiple births, those of twins for example, is very much major. Also it is more probable that there are left-handed the individuals of several groups with disorders neuronales, persons who suffer epilepsy, Down's syndrome, autism, 6 other forms of mental delay, dyslexia, etc. Statistically, the identical twin of the left-handed one, has 76 % of probabilities of being left-handed, for you cause partly genetically and partly environmental. Also between the people of the south of Asia, Eastern Europe, and descendants of people of the Asian Southeast, it is more left-handed than between no other ethnic group of the world, whereas between the descendants of people of western Europa, Northern Europe, and Africa it is less left-handed.
From the antiquity, the history has been molded by a good number of left-handed prominent figures.
Of the first ones that knowledge has (and not less important) we can emphasize the big ones: Ramses II, Egyptian Pharaoh; Alexander the Great, conquering Macedonian; the Roman emperors Tiberio and Julio César; and in America, Lloque Yupanqui, monarch Inca.