Modern liberalism asserts the transcendental, autonomous self's 'natural rights' against others' moralistic and political preferences, and regards the economist's utilitarian social welfare theory as instrumental to the achievement of 'social justice'. Timothy Roth argues that the liberal...

A long-standing challenge for welfare economics is to develop welfare criteria that can be applied to allocations with different population levels. Such a criterion is essential to resolve the optimal population problem, i.e., the tradeoff between population size and the welfare of each person...