Abstract: Fromm argues thatman’s reliance on nature is determined by its naturalness,and since man is a social product,man’s social nature determines that man will inevitably go out of nature for freedom.Now that modern man,in pursing freedom,regards nature as the obstacle to freedom,he will conquer and remold it,leading to alienation of nature.In spite of the contradictions between them,conflicts might not necessarily occur between man and nature.The root for the frequent ecological crises nowadays lies not in the contradictions between man and nature,but on the imperfect man cultivated in the imperfect society.To overcome these ecological crises and build a harmonious relationship between man and nature,perfect man should be developed.

Key words: separation, freedom, alienation, perfect man, integration, Fromm, nature