春秋战国时期是中国历史上新旧社会交替、各种制度全面变革的时期 ,春秋晚期更是处于这次社会大变革的关键时刻。对立统一思想是春秋晚期一种普遍的社会思潮。老子朴素唯物辩证法理论就是在这种特定的社会历史条件下产生的。《道德经》是中国哲学史上第一部较为完整的哲学著作 ,具有浓厚的原始色彩。尽管如此 ,这种理论的产生仍然具有重要意义 The Spring and Autumn Period and the Warring States Period are periods in which the new and old social alternations and various systems were completely changed in Chinese history. Late Spring and Autumn Period was at a crucial moment in this great social revolution. Opposition and unity thought is a kind of universal social thoughts in the late Spring and Autumn Period. Lao Tzu’s simple theory of materialist dialectics was born under this particular social and historical condition. “Moral classics” is the first complete philosophical work in the history of Chinese philosophy, with a strong original color. Nevertheless, the production of this theory is still of great significance