Biologically speaking, “human being” refers to the subspecies homo sapiens sapiens, a social mammal characterized by bipedality and the use of tools to alter its environment. The concepts of "human being" (Greek ánthropos, Latin homo, early modern English man) and “humanity” or “humankind” (Latin humanitas or humane genus; cf. Greek anthrṓpinon génos) were handed down to the early modern period in the form of fixed Gree…