This reply led to another criticism: that Callicott provides no “second-order principles” to prioritize duties to fellow humans and those to the biotic community when they conflict. In response, Callicott offered two second-order principles as a framework to adjudicate between conflicting first-order duties: 1) “obligations generated by membership in more venerable and intimate communities take precedence over those generated in more recently emerged and impersonal communities”; 2) “stronger interests take precedence over duties generated by weaker interests.” Because our various human community memberships are both more venerable and intimate and because human interests in enjoying rights to life, liberty, and the pursuit of happiness are very strong, Callicott argues that our traditional obligations to individual fellow human beings trump our obligations to preserve the integrity, stability, and beauty of the biotic community — at least, he believes, when it comes to the prospect of culling members of the overpopulous "Homo sapiens" species.