[John Rawls's] Theory of Justice begins with this assertion: “Justice is the first virtue of social institutions, as truth is of systems of thought. … - Raymond Geuss

Some forms of Kantianism put great weight on “what we can imagine” holding that this can be a source of insight into necessary connections. Thus various of Kant’s arguments about space and time depend on the purported fact that it is impossible for us to imagine certain things: we can know, Kant claims, a priori that space has only three dimensions because we cannot imagine it as having more than three dimensions. History in the form of non-Euclidean geometry and modern physics has put paid to that particular line of argument, but in general we should beware of depending too much on “What we can imagine?,” especially in politics. As Nietzsche puts it somewhere, sometimes the fact that you can’t imagine a situation in which things are very different from the way they are now is not an especially good argument for the claim that they must be as they now are, but, rather, represents a failure of your powers about which you should feel mildly apologetic.

Either there is or there is not a mechanism for enforcing human rights. If there is not, it would seem that calling them 'rights' simply means that we think it would (morally) be a good idea if they were enforced, although, of course, they are not. A 'human right' is an inherently vacuous conception, and to speak of 'human rights' is a kind of puffery or white magic.

When we use a tool in everyday life, it usually remains a detached instrument under my control and activated only when, where, and how I decide. … In contrast, conceptual innovations often “stick,” escape our control and become part of reality itself. Once Hobbes invents the idea of the “state” this idea can come into contact with real social forces with unforeseeable results. The “tool” develops a life of its own, and can become an inextricable part of the fabric of life itself.