Our capacity to affect what is happening, anywhere in the world, is one way in which we are living in an era of global responsibility. But there is also another way that offers an even more dramatic contrast with the past. The atmosphere and the oceans seemed, until recently, to be elements of nature totally unaffected by the puny activities of human beings. Now we know that our use of chlorofluorocarbons has damaged the ozone shield; our emission of carbon dioxide is changing the climate of the entire planet in unpredictable ways and raising the level of the sea; and fishing fleets are scouring the oceans, depleting fish populations that once seemed limitless to a point from which they may never recover. In these ways the actions of consumers in Los Angeles can cause skin cancer among Australians, inundate the lands of peasants in Bangladesh, and force Thai villagers who could once earn a living by fishing to work in the factories of Bangkok.

In these circ.u.mstances the need for a global ethic is inescapable. Is it nevertheless a vain hope? Here are some reasons why it may not be.

We live in a time when many people experience their lives as empty and lacking in fulfilment. The decline of religion and the collapse of communism have left but the ideology of the free market whose only message is: consume, and work hard so you can earn money to consume more. Yet even those who do reasonably well in this race for material goods do not find that they are satisfied with their way of life. We now have good scientific evidence for what philosophers have said throughout the ages: once we have enough to satisfy our basic needs, gaining more wealth does not bring us more happiness.

Consider the life of Ivan Boesky, the multimillionaire Wall Street dealer who in 1986 pleaded guilty to insider trading. Why did Boesky get involved in criminal activities when he already had more money than he could ever spend? Six years after the insider-trading scandal broke, Boesky's estranged wife Seema spoke about her husband's motives in an interview with Barbara Walters for the American ABC Network's 20/20 program. Walters asked whether Boesky was a man who craved luxury. Seema Boesky thought not, pointing out that he worked around the clock, seven days a week, and never took a day off to enjoy his money. She then recalled that when in 1982 Forbes magazine first listed Boesky among the wealthiest people in the US, he was upset. She assumed he disliked the publicity and made some remark to that effect. Boesky replied: 'That's not what's upsetting me. We're no-one. We're nowhere. We're at the bottom of the list and I promise you I won't shame you like that again. We will not remain at the bottom of that list.'