The genealogical imagination -- Ancestry and descent -- Lineage -- Pedigree -- Origins -- Co-descent -- Kinship -- Community and identity -- Nature and culture -- Blood -- Nature or culture? -- The rules of genealogical lineation -- The rules of genealogical delineation -- The politics of descent -- Stretching -- Cutting and pasting -- Clipping -- Braiding -- Lumping -- Marginalizing -- Splitting -- Pruning -- The genealogy of the future -- Genealogical engineering -- Integration -- Segregation -- Extinction -- The future of genealogy.