The HGDP says that one of its aims is to show that "... in biological terms, there is no such thing as a clearly defined race.... Most importantly, therefore the results of the Project are expected to undermine the popular belief that there are clearly defined races, [and] to contribute to the elimination of racism...."
This quotation
is from their summary document, on the web at: http://www.stanford.edu/group/morrinst/hgdp/summary93.html