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Legacy

Social democratic policies were first adopted in the German Empire between the 1880s and 1890s, when the conservative Chancellor Otto von Bismarck put in place many social welfare proposals initially suggested by the Social Democrats to hinder their electoral success after he instituted the Anti-Socialist Laws, laying the ground of the first modern welfare state. Those policies were dubbed State Socialism by the liberal opposition, but Bismarck later accepted and re-appropriated the term. It was a set of social programs implemented in Germany that Bismarck initiated in 1883 as remedial measures to appease the working class and reduce support for socialism and the Social Democrats following earlier attempts to achieve the same objective through Bismarck's Anti-Socialist Laws. This did not prevent the Social Democrats from becoming the biggest party in parliament by 1912.

Similar policies were later adopted in most of Western Europe, including France and the United Kingdom (the latter in the form of the Liberal welfare reforms), with both socialist and liberal parties adopting those policies. In the United States, the progressive movement, a similar social democratic movement predominantly influenced more by social liberalism than socialism, supported progressive liberals such as Democratic presidents Woodrow Wilson and Franklin D. Roosevelt, whose New Freedom and New Deal programmes adopted many social democratic policies. With the Great Depression, economic interventionism and nationalizations became more common worldwide and the post-war consensus until the 1970s saw Keynesian social democratic and mixed economy policies put in place, leading to the post-World War II boom in which the United States, the Soviet Union, the Western European, and East Asian countries experienced unusually high and sustained economic growth, together with full employment. Contrary to early predictions, this period of high economic growth and national development also included many countries that were devastated by the war, such as Japan (Japanese post-war economic miracle), West Germany and Austria (Wirtschaftswunder), South Korea (Miracle of the Han River), France (Trente Glorieuses), Italy (Italian economic miracle), and Greece (Greek economic miracle).

With the 1970s energy crisis, the abandonment of both the gold standard and the Bretton Woods system along with Keynesian social democratic, mixed-economy policies and the implementation of market-oriented, monetarist, and neoliberal policies (privatization, deregulation, free trade, economic globalization, and anti- inflationary fiscal policy, among others), the social democratic welfare state was put in doubt. This caused several social democratic parties to adopt the Third Way, a centrist ideology combining social democracy with neoliberalism; however, the Great Recession in the late 2000s and early 2010s cast doubts on the Washington Consensus, and protests against austerity measures ensued. There was a resurgence of social democratic parties and policies, especially in the United States and the United Kingdom, with the rise of politicians such as Bernie Sanders and Jeremy Corbyn, who rejected the Third Way, after the economic recession caused the Pasokification of many social democratic parties.

The United Nations World Happiness Report shows that the happiest nations are concentrated in social democratic nations, especially in Northern Europe, where the Nordic model is applied. This is at times attributed to the success of the social democratic Nordic model in the region, where similar democratic socialist, labourist, and social democratic parties dominated the region's political scene and laid the ground for their universal welfare states in the 20th century. The Nordic countries, including Denmark, Finland, Iceland, Norway, and Sweden, as well as Greenland and the Faroe Islands, also ranks highest on the metrics of real GDP per capita, economic equality, public health, life expectancy, solidarity, perceived freedom to make life choices, generosity, quality of life, and human development, while countries practising a neoliberal form of government have registered relatively poorer results. Similarly, several reports have listed Scandinavian and other social democratic countries as ranking high on indicators such as civil liberties, democracy, press, labour and economic freedoms, peace, and freedom from corruption. Numerous studies and surveys indicate that people live happier lives in countries ruled by social democratic parties than those ruled by neoliberal, centrist, and right-wing governments.