David Wiens

Numerous philosophers allege that the "general theory of second best" (Lipsey and Lancaster, 1956) poses a challenge to the Target View, which asserts that real world reform efforts should aim to establish arrangements that satisfy the constitutive features of ideal just states of affairs. I demonstrate two claims that are relevant in this context. First, I show that the theory of second best fails to present a compelling challenge to the Target View in general. But, second, the theory of second best requires ideal theorists to undertake certain kinds of causal and comparative analyses that are typically thought to lie beyond the borders of conventional ideal theory.

While there need be no conflict in theory between addressing global inequality (inequalities between people worldwide) and addressing domestic inequality (inequalities between people within a political community), there may be instances in which the feasible mechanism for reducing global inequality risks aggravating domestic inequality. The burgeoning literature on global justice has tended to overlook this type of scenario, and theorists espousing global egalitarianism have consequently not engaged with cases that are important for evaluating and clarifying the content of their theories. This chapter explores potential tensions between promoting global and domestic inequality. We introduce a class of second-best scenarios that global justice theorists have neglected to demonstrate the importance of such scenarios as an aid to constructing and evaluating ideals of global justice.

Recent methodological debates regarding the place of feasibility considerations in normative political theory are hindered for want of a rigorous model of the feasibility frontier. To address this shortfall, I present an analysis of feasibility that generalizes the economic concept of a production possibility frontier and then develop a rigorous model of the feasibility frontier using the familiar possible worlds technology. I then show that this model has significant methodological implications for political philosophy. On the Target View, a political ideal presents a long-term goal for morally progressive reform efforts and, thus, serves as an important reference point for our specification of normative political principles. I use the model to show that we can- not reasonably expect that adopting political ideals as long-term reform objectives will guide us toward the realization of morally optimal feasible states of affairs. I conclude by proposing that political philosophers turn their attention to the analysis of actual social failures rather than political ideals.