The conference chairs of the Society for U.S. Intellectual History (S-USIH) invites individual paper and panel proposals for its sixth annual conference to be held at the Omni Severin Hotel in Indianapolis, Indiana October 9-12, 2014. This year’s theme is “Materiality of Ideas.” This subject calls attention to the history of ideas by focusing on the various embodiments of American thought. This can include considerations of the relationship between immaterial and material realities; the development of American thought through the production or reproduction of ideas; the substance of thought, including the presence or absence of material objects; the manifestations of thought in economics, politics, or culture at local, national, or global levels; and, materialization in intellectual history including, but not limited to, book culture. Although proposals that relate to the theme are encouraged, the committee also welcomes submissions that are relevant to any aspect of the study of American thought.