Stegenga's Questioning of Population Individualism and Defense of Population Pluralism
Stegenga argues that the causal interactionist population definition proposed by Millstein suffers from am-biguity,invalidity,and over-restrictiveness,and further believes that her population individualism is not valid.Millstein responds to this by arguing that Stegenga's challenge is unwarranted.Stegenga goes on to develop a fur-ther critique of population individualism,arguing that the narrow definitions of population represented by Millstein's causal interactionist population concept faces numerous conceptual difficulties and counter-examples,and that causal interactions are epistemologically impossible.On the basis of proposing population pluralism,Stegenga fur-ther defends his population pluralism by responding to Millstein's questioning of the inconsistent usage,factual in-determinacy and burden of demarcation of population pluralism,as well as analyzing the relevant debates on natural selection in evolution.While Stegenga's population pluralism has some rationality,population monism is also rea-sonable,so the necessary tension between the two should be maintained.