Diachronic and synchronic reading

Post-structuralists generally assert that post-structuralism is historical, and classify structuralism as descriptive.

This terminology relates to Ferdinand de Saussure's distinction between the views of historical (diachronic) and descriptive (synchronic) reading. From this basic distinction, post-structuralist studies often emphasize history to analyze descriptive concepts. By studying how cultural concepts have changed over time, post-structuralists seek to understand how those same concepts are understood by readers in the present.

For example, Michel Foucault's Madness and Civilization is both a history and an inspection of cultural attitudes about madness. The theme of history in modern Continental thought can be linked to such influences as Georg Wilhelm Friedrich Hegel, Friedrich Nietzsche's On the Genealogy of Morals and Martin Heidegger's Being and Time.

Structuralists also seek to understand the historical interpretation of cultural concepts, but focus their efforts on understanding how those concepts were understood by the author in his or her own time, rather than how they may be understood by the reader in the present.

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