For other great powers did not see the world as one great human society, but – just as the British had done up to the nineteenth century – as an aren… - Correlli Barnett

Growing foreign perils were perceived and promptly and fully reported, first to London and then to ministers. Some permanent officials, such as Crowe in his time and later Vansittart, struggled hard to convince governments of the need for a strong foreign policy, and to puncture the prevailing euphoria with a bodkin of realism. They failed. They failed because there was another, competing influence on politicians, a more congenial and therefore in the end a more effective influence: a constellation of moralising internationalist cliques, each with its ideas-peddlers, its contact-men in high places, and its tame press. These busy romantics – from Philip Kerr (Lord Lothian) and Lord Robert Cecil on the Right, through liberals like Smuts and Gilbert Murray in the middle to Kingsley Martin and Clifford Allen on the Left – not only believed, admirably enough, that morality rather than power ought to govern relations between states but acted as though it did... The internationalists successfully imposed on governments their pretension to speak for the inarticulate and unsounded body of the British nation; that is, to represent public opinion at large.

The British complained at the time, and were long to complain afterwards, that the French had let them down; that the French army had not fought well enough; that France, by capitulating, had left them to carry on the war alone against overwhelming odds. These were complaints which the British, who had been hardly more than spectators of the battle, were singularly ill-qualified to make. For it was, after all, only the logical, if not the inevitable, consequences of the entire course of British policy towards France in the previous twenty years, and of the whole pattern of British grand strategy and re-armament in the 1930s, that France should virtually alone have to fight the decisive land battle against Germany, a nation twice her size; and that she should therefore lose that battle.
Now the British were face to face with the doom which, step by step, illusion by illusion, they had brought down on themselves – a war without an ally against two great powers, possibly three; their own island in danger; an ill-defended and immensely vulnerable empire; and an inadequate industrial machine; and insufficient and fast-dwindling national wealth.

Britain came out of the Second World War as an obsolescent industrial economy with grievous weaknesses. Instead of first devoting all possible resources and effort to remedying this, she chose to load this economy with the vast and potentially limitless cost of the welfare state; current expenditure before capital investment; the patterns of the next thirty years.