TO-DAY it is widely believed that the supreme aim of economic policy should be to provide full employment. Anybody who dares to criticise this article of faith is deemed to utter, in the words of St. Paul, vain and profane babblings . That is what now propose to do. Let me hasten to say at once that of course think full employment very desirable, and that of course agree that one of the principal aims of public policy should be to create conditions under which full employment is possible. But other things are very desirable too-for example, liberty and peace and better standards of living and less economic inequality and more social security. And a clash may easily arise between one of these aims and the aim of full employment. For example, it is very simple to abolish unemployment by abolishing liberty at the same time. If free trade unions are suppressed and strikes forbidden, if workers are not allowed to choose jobs or refuse them but must do what they are told, then of course full employment could be achieved. But think most of us would prefer our liberty. In the same way, war nearly always means full employment. This is partly because of the conscription of labour and partly because of vast Government expenditure. In 1942 heard one very eminent economist say of the United States: I always knew they could eliminate unemployment if only the Government spent enough. Most of us would think some LI 5 million a day rather too high a price, and in any event we would prefer peace to full employment plus war. The clash shall speak of this evening is the clash which may arise between full employment and better standards of living, with special reference to international trade. Standards of living depend mainly on output per head. Let us begin, therefore, by asking how significant unemployment is from this standpoint. Would full employment give us a world of plenty ? must remind you that a certain amount of unemployment is inevitable. At any moment some workers are seeking new jobs, some are not at work owing to bad weather, and some will not be able to earn the minimum standard rates fixed for their occupationunless special provision is made for this sub-normal minority, they will be able to get work only intermittently. It is generally recognised that a normal state of full employment would include a number out of work at any given moment. Thus, even in France, where the 1 The substance of an Inaugural Lecture delivered at the London School of Economics on zznd January, 1946, with Professor Robbins in the chair.