Truth as a cultural ideal has functioned as an opiate, perhaps the only serious opiate of the modern world. Karl Marx said that religion was the opiate of the masses. Raymond Aron retorted that Marxist ideas were in turn the opiate of the intellectuals. There is perspicacity in both these polemical thrusts. But is perspicacity truth? I wish to suggest that perhaps truth has been the real opiate, of both the masses and the intellectuals.

To those critics who see capitalism as a system of inegalitarian, oppressive structures, its defenders have vaunted its ability to recognize and encourage what they call individual merit and asserted not only the desirability but also the inevitability of differential reward, of earned privilege, so to speak.

The mark of the modern world is the imagination of its profiteers and the counter-assertiveness of the oppressed. Exploitation and the refusal to accept exploitation as either inevitable or just constitute the continuing antinomy of the modern era, joined together in a dialectic which has far from reached its climax in the twentieth century.

What is surprising is that their ideological opponents, the Marxists - the anti-liberals, the representatives of the oppressed working classes - believed in progress with at least as much passion as the liberals.

We can tentatively credit capitalist civilization with a positive, if very geographically uneven, record in the struggle against disease.

It seems to me the only pertinent question is: cui bono? It is clear that the size of the privileged strata as a percentage of the whole has grown significantly under historical capitalism. And for these people, the world they know is better on the whole than any their earlier counterparts knew.

The basic question that the 'new science' raises for our balance sheet is the issue of what scientific questions have not been asked for 500 years, which scientific risks have not been pursued. It raises the question of who has decided what scientific risks were worth taking, and what have been the consequences in terms of the power structures of the world.