This book places under sustained scrutiny some of our most basic modern assumptions about inheritance, genealogy, blood relations, and racial categories. It has at its core a deceptively simple question, one too often taken for granted: what constitutes "e;good"e; bonds among humans, and what compels us to determine them so across generations as both a physical and a metaphysical attribute? Answering this question is complex and involves a foray into a seemingly disparate array of early modern sources: from adages, common law, and literature about bloodlines and bastardy to philosophical, political, and scientific discourses that both confirm and confound the "e;common sense"e; of familial, communal, national, and racial identity.