Terror is not now, if it ever was, something that comes to us from outside. It is a part of the society in which we live. Both liberals and neoconser… - John N. Gray

The evil of totalitarianism is not only that it fails to protect specific liberties but that it extinguishes the very possibility of freedom.

The basis of the [scientific] method is a belief in natural uniformity – if two events are regularly connected in our observations we can conclude that they obey a universal law. But this is not a conclusion we reach by observation. No amount of evidence can demonstrate the existence of laws of nature, since new experience can always overturn them. Science rests on the belief that the future will be like the past; but that belief is rationally groundless. This is not a new line of thinking. David Hume argued that the expectation that the future will be like the past, which is the basis of induction, is a matter of habit. Hume wanted to show that since miracles transgress known laws of nature it was unreasonable to accept reports of them, in the Bible or anywhere else. But his arguments against induction showed that the laws of nature could not in fact be known, so events that seemed impossible could happen at any time. The upshot was that faith in miracles returned by the back door of sceptical doubt.

Hobbes’s understanding of the dangers of anarchy resonates powerfully today. Liberal thinkers still see the unchecked power of the state as the chief danger to human freedom. Hobbes knew better: freedom’s worst enemy is anarchy, which is at its most destructive when it is a battleground of rival faiths. The sectarian death squads roaming Baghdad show that fundamentalism is itself a type of anarchy in which each prophet claims divine authority to rule. In well-governed societies, the power of faith is curbed. The state and the churches temper the claims of revelation and enforce peace. Where this kind is impossible, tyranny is better than being ruled by warring prophets. Hobbes is a more reliable guide to the present than the liberal thinkers who followed. Yet his view of human beings was too simple, and overly rationalistic. Assuming that humans dread violent death more than anything, he left out the most intractable sources of conflict. It is not always because human beings act irrationally that they fail to achieve peace. Sometimes it is because they do not want peace. They may want the victory of the One True Faith – whether a traditional religion or a secular successor such as communism, democracy or universal human rights. Or – like the young people who joined far-Left terrorist groups in the 1970s, another generation of which is now joining Islamist networks – they may find in war a purpose that is lacking in peace. Nothing is more human than the readiness to kill and die in order to secure a meaning in life.