This collection is comprised of manuscripts, typescripts, and research materials documenting Étienne Balibar's studies and research from 1963 to 2001. A student of Louis Althusser, Balibar is best known as a Marxist philosopher and political theorist focused on historical materialism, critical theory, ethics, and political philosophy. The collection contains research notes and writings during his work with Althusser in the 1960s and documents the structuralist and Marxist thought of this group. It also includes Balibar's writings as a member of the French Communist Party. Balibar's notes and writings on Baruch Spinoza, René Descartes, Jean-Jacques Rousseau, and Ludwig Wittgenstein are also included. The vast majority of the materials are in French. This collection is comprised of draft manuscripts and research materials from philosopher and political theorist Étienne Balibar.