Monument to the Hour of Saint John in Pamplona, Navarre. Wikimedia Commons, CC BI
On February 23, 1575, town of Baeza (Jaen) witnessed the newsletter of a guide destined to revolutionize Renaissance idea: Ekamen de ingenios para las Ciencias. Its writer, Juan Huarte de San Juan, proposed a daring thesis for his time: folks have other herbal talents and must due to this fact be guided towards the research or professions perfect tailored to their explicit genius.
Born in 1529 in San Juan del Pie del Puerto (Navarra), Huarte is regarded as Andalusian via adoption. His circle of relatives, of transformed Jewish starting place, used to be driven via the consistent border conflicts between Spain and France to transport to Andalusia. After finding out drugs on the Complutense College in Alcalá de Henares, he returned to the south to follow in Linares and Baeza.
There he created his masterpiece, essentially the most edited and translated Latin American guide of its time, with greater than 82 reprints in seven languages.

English translation of Ekamen de ingenios from 1594. Wikimedia Commons. Innovation and the war with energy
The IQ check influenced now not simplest science, but in addition literature. Miguel de Cervantes is thought to have modeled Don Quixote’s psychology on Huarte’s theories of choleric temperament and “dryness” of the mind. Alternatively, his rationalist method introduced him issues.
Protecting that the functioning of the soul relies on subject matter and organic elements, Huarte challenged the dogmas of the Inquisition. His paintings used to be integrated within the Index of Prohibited Books, because the Holy Place of work considered with suspicion the concept human variations weren’t because of divine will, however to bodily nature.
Huarte said:
“God creates all souls equal; therefore differences should be sought in the nature and temperament of the body in which the soul resides.”
Concept of intelligence and primitive neuroscience
Huarte proposed a classification of sciences in keeping with 3 powers of the soul: reminiscence, working out and creativeness. What used to be cutting edge used to be his try to find those purposes within the ventricles of the mind, which supplies him the identify of the forerunner of phrenology (a idea that may later be advanced via Franz Joseph Gall, who expressly quoted Huarte).
“There within the brain…there are three little sinuses or chambers which, if you look closely, are all of the same composition and figure, and nature has made them to be an organ and an instrument, each of them for the three powers of the rational soul.”
Exam of sugar turbines, Juan Huarte de San Juan.
Concept of humor
To provide an explanation for those powers, he grew to become to the humor idea of Hippocrates and Galen, linking psychological schools to 3 bodily qualities: reminiscence calls for a humid setting, working out flourishes in dryness, and creativeness flourishes on heat.
Below this common sense, Huarte defined that over the top studying and loss of sleep “drained the brain”, simply as came about to the nobleman of L. a. Mancha, predisposing him to a wild and delirious creativeness.

Proema Ecamen de ingenios, the place writer Juan Huarte proposes a legislation that may come to a decision business in keeping with talent. Nationwide Library of Spain, CC BI Heritage of Modernity
The considered Huarte de San Juan sticks out for 3 pillars of modernity:
Use of Spanish: broke with Latin to unfold wisdom a number of the rising bourgeoisie.
Empirical manner: He positioned statement and enjoy prior to the scholastic argument of authority. He used to be some of the first to make use of the time period “trial” with a nuance just about the trendy experiment.
Knowledgeable steering: in his speech devoted to Philip II, he proposed the introduction of a legislation in order that each and every citizen may follow simplest the artwork for which he had a herbal ability, laying the rules for the choice of body of workers.

Other professions appropriate for folks in line with the predisposition in their soul. Personal elaboration in keeping with ‘Ekamen de ingenios’ via Juan Huarte de San Juan. A trend of Spanish psychology
The determine of Huarte de San Juan is central to the id of psychology in Spain. His selection as a patron used to be now not the results of likelihood or non secular custom. In December 1983, on the first assembly of deans of psychology schools – on the initiative of Dr. Rossi Fernandez Ballesteros, then dean of the Self sustaining College of Madrid – it used to be determined to damage with the customized of opting for a saint.
He used to be changed via this scientific thinker who already 4 centuries in the past sought a systematic foundation for particular person variations. For this reason February 23, the day of the newsletter of his paintings, is widely known because the psychologist’s baptismal day.
The various nature of the human thoughts
Even if a lot of his physiological explanations were outmoded, Huarte de San Juan stays a pioneer. He is regarded as the daddy of differential psychology, skilled orientation and the forerunner of eugenics and neurochemistry.
Even if his affect used to be deeper on Eu authors like Montesquieu or Rousseau than on Counter-Reformation Spain, his paintings marked the start of a systematic standpoint in our area. To get well his studying method to acknowledge that already within the sixteenth century a Navarra physician learned that the important thing to social unity lies in working out the various nature of the human thoughts.