But it was also clear that an all-round increase in wealth threatened the destruction – indeed, in some sense was the destruction – of a hierarchical society. In a world in which everyone worked short hours, had enough to eat, lived in a house with a bathroom and a refrigerator, and possessed a motor-car or even an aeroplane, the most obvious and perhaps the most important form of inequality would already have disappeared. If it once became general, wealth would confer no distinction. It was possible, no doubt, to imagine a society in which wealth , in the sense of personal possessions and luxuries, should be evenly distributed, while power remained in the hands of a small privileged caste. But in practice such a society could not long remain stable. For if leisure and security were enjoyed by all alike, the great mass of human beings who are normally stupefied by poverty would become literate and would learn to think for themselves; and when once they had done this, they would sooner or later realise that the privileged minority had no function, and they would sweep it away. In the long run, a hierarchical society was only possible on a basis of poverty and ignorance. To return to the agricultural past, as some thinkers about the beginning of the twentieth century dreamed of doing, was not a practicable solution. It conflicted with the tendency towards mechanisation which had become quasi-instinctive throughout almost the whole world, and moreover, any country which remained industrially backward was helpless in a military sense and was bound to be dominated, directly or indirectly, by its more advanced rivals.