History
In Western philosophy, traces of the idea that came to be called the tabula rasa appear as early as the writings of Aristotle. Aristotle writes of the unscribed tablet in what is probably the first textbook of psychology in the Western canon, his treatise "Περί Ψυχῆς" (De Anima or On the Soul, Book III, chapter 4). However, besides some arguments by the Stoics and Peripatetics, the notion of the mind as a blank slate went largely unnoticed for more than 1,000 years.
In the 13th century, St. Thomas Aquinas brought the Aristotelian and Avicennian notions to the forefront of Christian thought. These notions sharply contrasted with the previously held Platonic notions of the human mind as an entity that preexisted somewhere in the heavens, before being sent down to join a body here on Earth (see Plato's Phaedo and Apology, as well as others). St. Bonaventure (also 13th century) was one of Aquinas' fiercest intellectual opponents, offering some of the strongest arguments towards the Platonic idea of the mind.
The writings of Aquinas on the tabula rasa theory stood unprogressed and untested for several centuries. In fact, our modern idea of the theory is mostly attributed to John Locke's expression of the idea in An Essay Concerning Human Understanding in the 17th century. In Locke's philosophy, tabula rasa was the theory that the (human) mind is at birth a "blank slate" without rules for processing data, and that data is added and rules for processing are formed solely by one's sensory experiences. The notion is central to Lockean empiricism. As understood by Locke, tabula rasa meant that the mind of the individual was born "blank", and it also emphasized the individual's freedom to author his or her own soul. Each individual was free to define the content of his or her character - but his or her basic identity as a member of the human species cannot be so altered. It is from this presumption of a free, self-authored mind combined with an immutable human nature that the Lockean doctrine of "natural" rights derives. Locke's idea of tabula rasa is frequently compared with Thomas Hobbes's viewpoint of human nature, in which humans are endowed with inherent mental content – particular with selfishness.
Tabula rasa is also featured in Sigmund Freud's psychoanalysis. Freud depicted personality traits as being formed by family dynamics (see Oedipus complex, etc.). Freud's theories imply that humans lack free will, but also that genetic influences on human personality are minimal. In psychoanalysis, one is largely determined by one's upbringing.
Tabula rasa is used by 18th century philosopher Jean-Jacques Rousseau in order to support his argument that warfare is an advent of society and agriculture, rather than something that occurs from the human state of nature. Since tabula rasa states that humans are born with a "blank-slate" Rousseau uses this to suggest that humans must learn warfare.
The tabula rasa concept became popular in social sciences in the 20th century. Early ideas of eugenics posited that human intelligence correlated strongly with social class, but these ideas were rejected, and the idea that genes (or simply "blood") determined a person's character became regarded as racist. By the 1970s, scientists such as John Money had come to see gender identity as socially constructed rather than rooted in genetics.
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