The International Workingmen's Association (IWA), often called the First International (1864–1876), was an international organisation which aimed at uniting a variety of different left-wing socialist, social democratic, communist and anarchist groups and trade unions that were based on the working class and class struggle. It was founded in 1864 in a workmen's meeting held in St. Martin's Hall, London. Its first congress was held in 1866 in Geneva.

Social democracy is a political, social, and economic philosophy within socialism that supports political and economic democracy and supports a gradualist, reformist and democratic approach towards achieving socialism, usually under a social liberal framework. In practice, social democracy takes a form of socially managed welfare capitalism, achieved with partial public ownership, economic interventionism, and policies promoting social equality.