Overdetermination
Encyclopedia
Overdetermination, the idea that a single observed effect is determined by multiple causes at once (any one of which alone might be enough to account for the effect), was originally a key concept of Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

's psychoanalysis
Psychoanalysis
Psychoanalysis is a psychological theory developed in the late 19th and early 20th centuries by Austrian neurologist Sigmund Freud. Psychoanalysis has expanded, been criticized and developed in different directions, mostly by some of Freud's former students, such as Alfred Adler and Carl Gustav...

.

For Freud and Psychoanalysis

Freud wrote in The Interpretation of Dreams
The Interpretation of Dreams
The Interpretation of Dreams is a book by psychoanalyst Sigmund Freud. The first edition begins:.The book introduces Freud's theory of the unconscious with respect to dream interpretation...

that many features of dreams were usually "overdetermined," in that they were caused by multiple factors in the life of the dreamer, from the "residue of the day" (superficial memories of recent life) to deeply repressed traumas and unconscious wishes, these being "potent thoughts". Freud favored interpretations which accounted for such features not only once, but many times, in the context of various levels and complexes of the dreamer's psyche.

The concept was later borrowed for a variety of other realms of thought.

In the Philosophy of Causation

In contemporary analytic philosophy
Analytic philosophy
Analytic philosophy is a generic term for a style of philosophy that came to dominate English-speaking countries in the 20th century...

 an event or state of affairs is said to be overdetermined if there are two or more distinct, sufficient causes of it. Whereas there may unproblematically be recognised many different necessary conditions of the event's occurrence, no two distinct events may lay claim to be sufficient conditions, since this would lead to overdetermination. A much used example is that of firing squads, the members of which simultaneously firing at and 'killing' their targets. Apparently, no one member can be said to have caused the victims' deaths, since he or she would have been killed anyway. Overdetermination is problematic in particular from the viewpoint of a standard counterfactual
Counterfactual
Counterfactual may refer to:* Counterfactual conditional, a grammatical form * Counterfactual subjunctive, grammatical forms which in English are known as the past and pluperfect forms of the subjunctive mood* Counterfactual thinking* Counterfactual history* Alternate history, a literary genre*...

 understanding of causation, according to which an event is the cause of another event if and only if the latter would not have occurred, had the former not occurred. In order to employ this formula to actual complex situations, implicit or explicit conditions need to be accepted to be circumstantial, since the list of counterfactually acceptable causes would otherwise be impractically long (e.g. the Earth's continued existence could be said to be the (necessary) cause of one drinking one's coffee). Unless a circumstance-clause is included, the putative cause to which one wishes to draw attention could never be considered sufficient, and hence not comply with the counterfactual analysis.

For Richards and literature

The New Critic I.A. Richards used the idea of overdetermination in order to explain the importance of ambiguity
Ambiguity
Ambiguity of words or phrases is the ability to express more than one interpretation. It is distinct from vagueness, which is a statement about the lack of precision contained or available in the information.Context may play a role in resolving ambiguity...

 in rhetoric
Rhetoric
Rhetoric is the art of discourse, an art that aims to improve the facility of speakers or writers who attempt to inform, persuade, or motivate particular audiences in specific situations. As a subject of formal study and a productive civic practice, rhetoric has played a central role in the Western...

, the philosophy of language
Philosophy of language
Philosophy of language is the reasoned inquiry into the nature, origins, and usage of language. As a topic, the philosophy of language for analytic philosophers is concerned with four central problems: the nature of meaning, language use, language cognition, and the relationship between language...

, and literary criticism
Literary criticism
Literary criticism is the study, evaluation, and interpretation of literature. Modern literary criticism is often informed by literary theory, which is the philosophical discussion of its methods and goals...

.

For Althusser and Structuralist Marxism

The Marxist philosopher
Marxist philosophy
Marxist philosophy or Marxist theory are terms that cover work in philosophy that is strongly influenced by Karl Marx's materialist approach to theory or that is written by Marxists...

 Louis Althusser
Louis Althusser
Louis Pierre Althusser was a French Marxist philosopher. He was born in Algeria and studied at the École Normale Supérieure in Paris, where he eventually became Professor of Philosophy....

 imported the concept into Marxist politics
Politics
Politics is a process by which groups of people make collective decisions. The term is generally applied to the art or science of running governmental or state affairs, including behavior within civil governments, but also applies to institutions, fields, and special interest groups such as the...

 in an influential essay, "Contradiction and Overdetermination". Drawing, in an unusual combination, from both Freud and Mao Zedong
Mao Zedong
Mao Zedong, also transliterated as Mao Tse-tung , and commonly referred to as Chairman Mao , was a Chinese Communist revolutionary, guerrilla warfare strategist, Marxist political philosopher, and leader of the Chinese Revolution...

, Althusser used the idea of overdetermination as a way of thinking about the multiple, often opposed, forces active at once in any political situation, without falling into an over-simple idea of these forces being simply "contradictory." Brewster, in Althusser et al.'s Reading Capital
Reading Capital
Reading Capital is a 1965 work of Marxist philosophy and theory. The book collects essays developed by Louis Althusser and his students in a seminar on Karl Marx's Das Kapital which took place earlier in 1965...

defines overdetermination as such:

"the representation of dream thoughts in images privileged by their condensation of a number of thoughts in a single image (condensation), or by the transference of psychic energy from a particularly potent thought to apparently trivial things ... [For Althusser] overdetermination of a contradiction is the reflection in it of its conditions of existence within the complex whole."

Thus, for Althusser's reiterating of Marxist thought, overdetermination is what [concealed/unaccepted] "determinant contradictions", or capital-economic incongruities (i.e., abstract labour resulting in "isolation" -- the class struggle), which are analogous to Freud's "potent thoughts", apply to instances that are more really, slight, understandable. An instance of a popular riot calling for revolution could exemplify this. The event has to it, in capitalist culture, an over-application (determination) of agitation. The determinant contradictions (the reasons for popular revolt) are not addressed and so their great mass is "displaced" onto the singular event.
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