This study presents the historical impact of Kant's Opus postumum, the philosopher's last unfinished work, in a critical discussion that extends from the time of the work's initial reception in the 19th century up to contemporary Kant research. The common thread that unites this study is a systematic historical reconstruction of the disputes between those interpreters who saw this work as a major departure on the part of the late Kant from the philosophy of his critical writings, and others who saw this posthumously published work as coherently evolving from Kant's earlier...