Includes ephemera, form letters and correspondence, pamphlets, news clippings, and other materials related to a wide variety of socio-political organizations, both left- and right-leaning, mostly located in the United States. Series has been organized in rough alphabetical order by organization name. Newsletters or other minor publications may be noted in ("parentheses") in folder titles if those items are included, or specific indivdiuals associated with an organization may also be noted (in parentheses).