Abstract
In the discussion of global ethics, philosophical ethics risks losing its distinct theoretical horizons. This predicament arises primarily from philosophy's failure to anchor its own object and to provide a rational basis for global justice from within its current confined theoretical paradigm. Against this background, this paper will first prioritize global co-existence as the primary concern of global ethics, then propose ontological co-existence justice as its foundational principle, and finally argue that the normative validity of co-existence justice is predicated on the nations fulfilling the critical requirements of modern civilization, namely, the advancement of individual freedom.