马克思、恩格斯于１９世纪后半叶缔造的统一的世界社会主义运动（第一国际到第二国际），在两位导师逝世后分裂成由共产党领导的革命的社会主义运动和由社会民主党领导的改良的社会主义运动，于２０世纪分两路以不同的方式推动了资本主义向社会主义的不同深度的过渡。 由共产 The unification of the world socialist movement (First International to Second International) created by Marx and Engels in the latter half of the 19th century, after the death of the two mentors, was split into a revolutionary socialist movement led by the Communist Party and a socialist democracy led by the Social Democrats The improved socialist movement promoted the transition from capitalism to socialism in different ways in two ways in the 20th century. By the Communist