在欧洲的政治光谱中,处于左翼的共产党和社会党一直发挥着重要影响。由于所代表的利益派别不同,导致了它们社会基础和意识形态的差别,致使两党之间的摩擦远远多于合作,给社会主义运动造成了很大影响。北京大学黄宗良、林勋健教授主编的《共产党和社会党百年关系史》(北京大学出 In the European political spectrum, the left-wing Communists and Socialists have always played an important part. Because of the different interests they represent, they lead to differences in social foundation and ideology, resulting in far more friction between the two parties than in cooperation, which has greatly affected the socialist movement. Peking University Huang Zongliang, Professor Lin Xunjian editor of the "Communist Party and the Socialist History of Hundred Years (Peking University out