 An important issue that connects the conservatism of Hume, Burke, Sidgwick is what people have reason to expect over time. Suppose one holds that justice requires X, but that people have long been doing Y, which is incompatible with X, and have entered into life-plans that assume that Y is how things are. If one tries to make society more just by preventing people doing Y, that in itself is an unjust action. Hence what Feinberg called Sidgwick’s paradox of conservative justice (Sidgwick 2011: III.5). As Feinberg writes, insofar as our institutions depart from Rawls’s basic principles of justice, we have a duty, he says, to work toward their reform. But in our actual imperfect world