人类的交往实践内在蕴涵着（及交织着）“主—客”关系和“主—主”关系这样两重关系。其中，“主—主”关系（交互主体关系）就是人类的伦理关系。“主—主”关系是一种具有价值蕴涵的关系，这种价值蕴涵，即为人类个体主体间相互平等的承认与尊重。在社会交往实践中实现这种内在价值蕴涵，是一个人类自由的问题。在漫长的人类历史中，都把伦理关系片面化、畸形化了，“主—主”关系异化成“主—客”关系。而人类历史的进步表明，人类社会正朝着普遍主体的相互承认、相互尊重的道德自由的终极目标迈进 The inherent relationship between human beings implies (and intertwines) the dual relationship of “master-guest” and “master-master” relationship. Among them, the “Lord - Lord” relationship (interactive subject relationship) is the ethical relationship of mankind. The “Lord-Master” relationship is a kind of relationship with value implication. This kind of value implies the recognition and respect of each other’s individual subjects equally. The realization of this intrinsic value implication in social interaction practice is a question of human freedom. In the long history of human beings, the ethical relations have been made one-sided and deformable, and the relationship of “Lord and Master” has been alienated into the relationship of “Lord and Guest.” The progress of human history shows that human society is moving toward the ultimate goal of universal recognition of mutual respect and moral freedom of mutual respect