Foucault is mostly regarded as a philosopher, despite the fact that most of his books were histories. He characterized his historic works first as ‘archaeology’ and then later as ‘genealogy’. What did he mean by archaeology? ‘Archaeology’ considers why Foucault defined his writing in these terms and what it shows us about his ideas. His notion of an archaeology of thought is closely linked to the modernist literary idea of language as a source of thought rather than an instrument of expression. Foucault was interested in the idea that every mode of thinking implicitly involves rules that restrict the range of thought. Foucault's archaeology aimed at history without the individual subject.