There is no more consensus on what justice means than there is on the character of the good. If anything, there is less. Among the virtues, justice i… - John N. Gray

In Leopardi’s view, the universal claims of Christianity were a licence for universal savagery. Because it is directed to all of humanity, the Christian religion is usually praised, even by its critics, as an advance on Judaism. Leopardi – like Freud a hundred years later – did not share this view. The crimes of medieval Christendom were worse than those of antiquity, he believed, precisely because they could be defended as applying universal principles: the villainy introduced into the world by Christianity was ‘entirely new and more terrible … more horrible and more barbarous than that of antiquity’. Modern rationalism renews the central error of Christianity – the claim to have revealed the good life for all of humankind. Leopardi described the secular creeds that emerged in modern times as expressions of ‘half-philosophy’, a type of thinking with many of the defects of religion. What Leopardi called ‘the barbarism of reason’ – the project of remaking the world on a more rational model – was the militant evangelism of Christianity in a more dangerous form. Events have confirmed Leopardi’s diagnosis. As Christianity has waned, the intolerance it bequeathed to the world has only grown more destructive. From imperialism through communism and incessant wars launched to promote democracy and human rights, the most barbarous forms of violence have been promoted as means to a higher civilization.

If we are to put interrogators to work in defence of liberal values, their role in the community must receive proper recognition. They will require intensive counselling to overcome the inevitable traumas that this difficult work involves. They must be enabled to see themselves as dedicated workers in the cause of progress. Psychotherapy must be available to help them avoid the negative self-image from which some torturers have suffered in the past.

Against the many Russian thinkers influenced by Hegel who believed that history was governed by universal laws to which one could only submit, Turgenev upheld the freedom of different societies to pursue different paths of development and of individuals to pursue, even in opposition to powerful historical forces, their own goals and values. Here Turgenev endorsed the celebrated dictum of Alexander Herzen, with whom he disagreed on other matters: that history has no libretto. Human history is a realm of contingency and unpredictability, in which each generation faces conflicts that have no ideal solution.