几乎所有的世界发达国家都自认为是社会民主政体，奉行混合经济体制，由庞大的政府实行多种社会福利和保障体制，以政府行为代替市场调节进行大部分社会财富和生活物资的分配调节工作。
Almost all of the world’s developed countries consider themselves, and are, social democracies: mixed economies with very large governments performing a wide array of welfare and social insurance functions, and removing large chunks of wealth and commodity distribution from the market.