A welfare state is a political system wherein the State assumes responsibility for the health, education, and welfare of society. The system of social security in a welfare state provides social services, such as universal medical care, unemployment insurance for workers, financial aid, free post-secondary education for students, subsidized public housing, and pensions (sickness, incapacity, old-age), etc. In 1952, with the Social Security (Minimum Standards) Convention (nr. 102), the International Labour Organization (ILO) formally defined the social contingencies covered by social security. The first welfare state was Imperial Germany (1871–1918), where the Bismarck government introduced social security in the late 19th century. In the early 20th century, Great Britain introduced social security around 1913, and adopted the welfare state with the National Insurance Act 1946, during the Attlee government (1945–51). In the countries of western Europe, Scandinavia, and Australasia, social welfare is mainly provided by the government out of the national tax revenues, and to a lesser extent by non-government organizations (NGOs), and charities (social and religious). In the U.S., welfare program is the general term for government support of the well-being of poor people, and the term social security refers to the US social insurance program for retired and disabled people. In other countries, the term social security has a broader definition, which refers to the economic security that a society offers when people are sick, disabled, and unemployed. In the U.K., government use of the term welfare includes help for poor people and benefits, including specific social services such as help in finding employment. In the Roman Empire, the first emperor Augustus provided the Cura Annonae or grain dole for citizens who could not afford to buy food every month. Social welfare was enlarged by the Emperor Trajan. Trajan's program brought acclaim from many, including Pliny the Younger. The Song dynasty government (c.1000AD in China) supported multiple programs which could be classified as social welfare, including the establishment of retirement homes, public clinics, and paupers' graveyards. According to economist Robert Henry Nelson, 'The medieval Roman Catholic Church operated a far-reaching and comprehensive welfare system for the poor...' Early welfare programs in Europe included the English Poor Law of 1601, which gave parishes the responsibility for providing welfare payments to the poor. This system was substantially modified by the 19th-century Poor Law Amendment Act, which introduced the system of workhouses. Public assistance programs were not called welfare until the early 20th century when the term was quickly adopted to avoid the negative connotations that had become associated with older terms such as charity. It was predominantly in the late 19th and early 20th centuries that an organized system of state welfare provision was introduced in many countries. Otto von Bismarck, Chancellor of Germany, introduced one of the first welfare systems for the working classes. In Great Britain the Liberal government of Henry Campbell-Bannerman and David Lloyd George introduced the National Insurance system in 1911, a system later expanded by Clement Attlee. The United States inherited England's poor house laws and has had a form of welfare since before it won its independence. During the Great Depression, when emergency relief measures were introduced under President Franklin D. Roosevelt, Roosevelt's New Deal focused predominantly on a program of providing work and stimulating the economy through public spending on projects, rather than on cash payment. Modern welfare states include Germany, France, the Netherlands, as well as the Nordic countries, such as Iceland, Sweden, Norway, Denmark, and Finland which employ a system known as the Nordic model. Esping-Andersen classified the most developed welfare state systems into three categories; Social Democratic, Conservative, and Liberal.