5. Late work (1980–1986): Aleatory Materialism
After being interrupted by ill health and by the events following from the murder of his wife, in 1982 Althusser returned to the question of what was essential to Marx’s philosophy and expanded the scope of this inquiry to include speculation about the metaphysics that must underlie it. Freed by his ignoble status from the task of influencing the direction of the Communist movement, the texts associated with this project and gathered together in the bookPhilosophy of the Encounter differ tremendously in subject matter, style, and method from his other writings. Whether these texts represent a continuation of, or even the key to his philosophy or whether they are an aberration is presently being debated in the secondary literature. However, as there is strong textural and archival evidence that many of the ideas explicitly expressed in these works had been gestating for a long time, the contention that these writings are of a piece with his earlier work seems to be gaining ground.
The principal thesis of Althusser’s last philosophical writings is that there exists an “underground” or little recognized tradition in the history of philosophy. Variously labeled a “materialism of the encounter” or “aleatory materialism,” the method which he uses to articulate this philosophy is to simply comment upon works by philosophers who exemplify this current and to point out where, how, and to what extent they do so. In addition to Marx, the philosophers that he cites as being part of this underground tradition include Democritus, Epicurus, Lucretius, Machiavelli, Spinoza, Hobbes, Rousseau, Montesquieu, Heidegger, and Wittgenstein. From these readings in the history of philosophy, Althusser aims to suggest that this tradition exists and that it is both philosophically fecund and viable. He also wishes to return to and bolster the thesis he first ventured in the late 1960s that there are really only two positions in philosophy: materialism and idealism. As he understood it, the two tendencies are always in a war of opposition with the one functioning to reinforce the status quo and the other to possibly overcome it.
Perhaps because it functions in opposition to the idealist tendency in philosophy, aleatory materialism is marked almost as much by its rejections as it is by the positive claims it contains about the world and about history. As Marx is included within this tradition, it is not surprising that many of these rejections are also attributed to him during the course of Althusser’s earlier work. These include a dismissal of what Althusser calls “the principle of Reason,” or the idea that the universe or history has an origin or an end. With this prohibition, Althusser means to exclude from this tradition not only the usual suspects in the rationalist tradition, but also mechanical and dialectical materialisms with their logics of determination. Also dismissed, he maintains, is the myth that somehow philosophy and philosophers are autonomous, that they see the world from outside and objectively. Though there is an objective world, philosophy does not have knowledge of this world as its object for there is no way for it to ground itself and the material it thinks with and through arises historically. Philosophy is therefore not a science or the Science of sciences and it produces no universal Truth. Rather, the truths it produces are contingent and are offered in opposition to other competing truths. If philosophy does have an object, it is the void, or that which is not yet but which could be.
That the philosophy of the encounter lacks an object does not mean that it lacks positive propositions. However, given the epistemological status attributed to philosophy by Althusser, these metaphysical propositions or “theses” are true only insofar as they have explanatory or practical value. First among them, following Democritus, is the thesis that matter is all that exists. Second is the thesis that chance or the aleatory is at the origin of all worlds. That the patterns which constitute and define these worlds can be known, described, and predicted according to certain laws or reasons is also true. However, the fact that these worlds ever came to be organized in these patterns is aleatory and the patterns themselves can only ever be known immanently. Third, new worlds and new orders themselves arise out of chance encounters between pre-existing material elements. Whether or not such orders emerge is contingent: they do not have to occur. When material elements collide, they either “take” and a new order is founded, or they do not and the old world continues.
To Althusser, the propositions which have explanatory value at the level of ontology and cosmology also have value at the level of political philosophy. After first citing Rousseau and Hobbes as example of philosophers who recognized that the origin and continued existence of political orders is contingent, Althusser turns to Machiavelli and Marx for his principle examples of how aleatory materialism functions in the political realm. The anti-teleological, scientistic, and anti-humanist, Marxist philosophy developed by Althusser over the course of his career works well with the materialist metaphysics recounted above. In this understanding of Marxist philosophy, societies and subjects are seen as patterns of activity that behave in predictable ways. Though scientists may study and describe these orders in their specificity, it does not at first appear that philosophy can do much except to categorize these interactions at the most general level. However, citing Marx’s work again and taking inspiration from Machiavelli’s project of installing “a new prince in a new principality,” Althusser argues that the materialist philosopher may accomplish somewhat more than this with her descriptions, critiques, and predictions. This is because, by examining a political order not from the perspective of its necessity but with an awareness of its contingency, this philosopher may be able think the possibility of its transformation. If chance smiles on her, if someone listens and if effects occur, then elements might recombine and a new political might take hold. This is, to be sure, a very limited and unpredictable power attributed to the philosopher. However, it is also the only one that Althusser in his late works argues is adequate for political practice and that does not, like idealism, merely serve to reproduce existing relations.
https://plato.stanford.edu/entries/althusser/#LatWor198AleMat