The fourth part Has described the western Marxism natural view, especially the ecology Marxism and pointed out ecology Marxism to mediate ecology with people and natural relation of the theory of Marxism that analyse the capitalist ecocrisis comes with .

• 第四部分论述了西方马克思主义的自然观,特别是生态学马克思主义的基本观点,指出生态学马克思主义把生态学同马克思主义的人与自然关系的理论作了调和,以此来分析资本主义生态危机的原因。