关键词: 实践理性, 前提预设, 马克思实践哲学, 全球危机

Abstract: The discussion on the issue of practical rationality condenses all the theoretical nodes of practical philosophy, and what exactly is “practical rationality” is a prerequisite question that must first be clarified. Rationality used in practice includes two basic levels: scientific rationality and value rationality, among which value rationality is of primary importance. Practical rationality refers to the value rationality. The basic difference between practical rationality and scientific rationality is that the former involves establishing eternal, absolute, ultimately significant and ingrained value concepts in rational thinking as the universal principle and ultimate basis for guiding practical activities, through which evaluations and arguments on the rationality or legality of practical activities can be made. This value presupposition of practical rationality does not come from the induction, generalization, and abstraction of the empirical world, but from the pure rationality of man. The function of the value presupposition of practical rationality is to construct and criticize. The critical nature of Marxs practical philosophy is also based on the presupposition of the nature of human freedom, and the loss of this value presupposition will dissolve the critical nature of Marxs practical philosophy. The ideological root of the global risks or crises in the contemporary world lies in the dilution or marginalization of practical rationality, and the common values of humanity put forward by the Chinese Communists and the concept of “building a community with a shared future for mankind” on the basis are the right way to break out of the global crises.

Key words: practical rationality, presupposition, Marxs practical philosophy, global crisis