西欧社会民主党（包括工党、社会党）是欧洲政坛的一支重要政治力量，在世界范围内也有很大影响。近十年来，西欧社会民主党的力量影响经历了低落、高涨的过程。目前在欧盟15国中2/3以上的国家取得了参政执政地位，这与他们在理论和实践上的调整变革密切相关。他们为什么要进行 Western European Social Democrats (including the Labor Party and the Socialist Party) are important political forces in European political circles and have a great influence on the world. In the past decade, the forces of Western European Social Democrats have undergone a process of decline and soaring. At present, more than two-thirds of the 15 EU countries have obtained the status of participating in politics. This is closely related to their changes in theory and practice. Why do they want to proceed