There is a painful contrast between the enormous objective projects that we set in train, at incalculable financial and environmental cost – the construction of terminals, of runways and of wide-bodied aircraft – and the subjective psychological knots that undermine their use. How quickly all the advantages of technological civilisation are wiped out by a domestic squabble. At the beginning of human history, as we struggled to light fires and to chisel fallen trees into rudimentary canoes, who could have predicted that long after we had managed to send men to the moon and aeroplanes to Australasia, we would still have such trouble knowing how to tolerate ourselves, forgive our loved ones and apologise for our tantrums?