espread acceptance, with eminent American professors such as Alvin Hansen agreeing with the General Theory before the outbreak of World War II. 
Keynes himself had only limited participation in the theoretical debates that followed the publication of the General Theory as he suffered a heart attack in 1937, requiring him to take long periods of rest. Among others, Hyman Minsky and Post-Keynesian economists have argued that as result, Keynes's ideas were diluted by those keen to compromise with classical economists or to render his concepts with mathematical models like the IS–LM model (which, they argue, distort Keynes's ideas). Keynes began to recover in 1939, but for the rest of his life his professional energies were largely directed towards the practical side of economics – the problems of ensuring optimum allocation of resources for the war efforts, post-war negotiations with America, and the new international financial order that was presented at the Bretton Woods Conference.
In the General Theory and later, Keynes responded to the socialists and left-wing liberals who argued, especially during the Great Depression of the 1930s, that capitalism caused war. He argued that if capitalism were managed domestically and internationally (with coordinated international Keynesian policies, an international monetary system that didn't pit the interests of countries against each other, and a high degree of freedom of trade), then this system of managed capitalism could promote peace rather than conflict between countries. His plans during World War II for post-war international economic institutions and policies (which contributed to the creation at Bretton Woods of the International Monetary Fund and the World Bank, and later to the creation of the General Agreement on Tariffs and Trade and eventually the World Trade Organization) were aimed to give effect to this vision.
Although Keynes has been widely criticised – especially by members of the Chicago school of economics – for advocating irresponsible government spending financed by borrowing, in fact he was a firm believer in balanced budgets and regarded the proposals for programs of public works during the Great Depression as an exceptional measure to meet the needs of exceptional circumstances.
Second World War
During the Second World War, Keynes argued in How to Pay for the War, published in 1940, that the war effort should be largely financed by higher taxation and especially by compulsory saving (essentially workers lending money to the government), rather than deficit spending, in order to avoid inflation. Compulsory saving would act to dampen domestic demand, assist in channelling additional output towards the war efforts, would be fairer than punitive taxation and would have the advantage of helping to avoid a post war slump by boosting demand once workers were allowed to withdraw their savings. In September 1941 he was proposed to fill a vacancy in the Court of Directors of the Bank of England, and subsequently carried out a full term from the following April. In June 1942, Keynes was rewarded for his service with a hereditary peerage in the King's Birthday Honours. On 7 July his title was gazetted as "Baron Keynes, of Tilton, in the County of Sussex" and he took his seat in the House of Lords on the Liberal Party benches.
As the Allied victory began to look certain, Keynes was heavily involved, as leader of the British delegation and chairman of the World Bank commission, in the mid-1944 negotiations that established the Bretton Woods system. The Keynes-plan, concerning an international clearing-union, argued for a radical system for the management of currencies. He proposed the creation of a common world unit of currency, the bancor, and new global institutions – a world central bank and the International Clearing Union. Keynes envisaged these institutions managing an international trade and payments system with strong incentives for countries to avoid substantial trade deficits or surpluses. The USA's greater negotiating strength, however, meant that the final