Social democracy is a political, social and economic philosophy within socialism. As an economic ideology and policy regime, it is described by academics as advocating economic and social interventions to promote social justice within the framework of a liberal-democratic polity and a capitalist-oriented mixed economy. The protocols and norms used to accomplish this involve a commitment to representative and participatory democracy, measures for income redistribution, regulation of the economy in the general interest and social-welfare provisions. Due to longstanding governance by social democratic parties during the post-war consensus and their influence on socioeconomic policy in Northern and Western Europe, social democracy became associated with Keynesianism, the Nordic model, the social liberal paradigm and welfare states within political circles in the late 20th century. It has been described as the most common form of Western or modern socialism as well as the reformist wing of democratic socialism.