 The problem remains of reconciling the imperatives of prudence and (social) justice in practice, of reconciling the good for oneself with the good for others in our self-directed, principled, thinking and doing. What aids us is that, through language and civilization, humans remember as a species and not merely as individuals. What we are justified in thinking thereby is that human achievement and social progress require autonomous, self-criticizing and self-governing individuals, and that individual achievement and realization of cherished goods requires membership in a social order of individuals co-operating in the pursuit of values cherished in common. The contrast between individual prudence and social justice seems fundamental, Lewis concludes, perhaps rather optimistically, only by forgetting this (Lewis 1952b).