Tychism

Tychism (Greek: τύχη "chance") is a thesis proposed by the American philosopher Charles Sanders Peirce that holds that absolute chance, or indeterminism, is a real factor operative in the universe. This doctrine forms a central part of Peirce's comprehensive evolutionary cosmology. It may be considered both the direct opposite of Einstein's oft quoted dictum that: "God does not play dice with the universe" and an early philosophical anticipation of Werner Heisenberg's uncertainty principle.

In an article published in The Monist for January, 1891, I endeavored to show what ideas ought to form the warp of a system of philosophy, and particularly emphasized that of absolute chance. In the number of April, 1892, I argued further in favor of that way of thinking, which it will be convenient to christen tychism (from tyché, chance). A serious student of philosophy will be in no haste to accept or reject this doctrine; but he will see in it one of the chief attitudes which speculative thought may take, feeling that it is not for an individual, nor for an age, to pronounce upon a fundamental question of philosophy. That is a task for a whole era to work out. I have begun by showing that tychism must give birth to an evolutionary cosmology, in which all the regularities of nature and of mind are regarded as products of growth, and to a Schelling-fashioned idealism which holds matter to be mere specialized and partially deadened mind." - C.S. Peirce, "The Law of Mind", 1892.

In his theory of tychism, Peirce sought to deny the central position of the doctrine of necessity which maintains that "the state of things existing at any time, together with certain immutable laws, completely determine the state of things at every other time." One of the principal arguments of the necessitarians is that their position involves a presupposition of all science. Peirce attacks this idea asserting: "To 'postulate' a proposition is no more than to hope it is true." Thus an avenue is opened up allowing the entry of chance as a fundamental and absolute entity.

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