The history of archaeology in the
US is rooted in the part-time enthusiasm of, usually wealthy,
Antiquarians who formed the field's initial foundation. By the start of the
Great Depression, the field was mostly practiced by a small group of elite academics with varying levels of research standards. Following large numbers of archaeologists trained and employed by the
WPA and the subsequent swelling of many academic disciplines by
GI Bill servicemen after WWII, the need for standards of conduct was increasing. By the 1960s, the
New Archaeology was revolutionizing American archaeology to more statistically and scientifically-oriented methods, which carried over to the burgeoning sector of federally-mandated archaeological
impact assessments, particularly after
NHPA 1966 and subsidiary legislation. Since archaeology is controlled destruction, where the context of the materials is largely destroyed in the process, the rising number of those practicing archaeology increased the need for a professional certification process. In 1976, the Society of Professional Archaeologists (SOPA) was founded as a means of vetting and enforcing the accepted standards of archaeological research. These standards set the practical and ethical expectations for archaeological research (e.g., for scientifically-based field methods, prompt reporting, the treatment and curation of artifacts, and aversion to monetary valuation of artifacts). In 1998, SOPA was reorganized and renamed the Register of Professional Archaeologists (RPA), per a joint task-force en-paneled by the
Society for American Archaeology, the
Society for Historical Archaeology, and the
American Institute of Archaeology. The change in name was intended to emphasize the organization's refocus towards professional members (rather than amateurs or students) and to de-emphasize conference and publication services already offered by sponsoring organizations. A representative of the RPA sits on the Board of these and other sponsoring organizations. ==Standards of Research and Code of Conduct==