The five volumes contain the edited versions of all the plenary papers and the papers delivered to the sections at the IX. International Kant Congress, which was held in March 2000 at the Humboldt University in Berlin. The contributions are divided into the following sections: Kant before the Critiques, Kant's theoretical philosophy, Kant's practical philosophy; Kant's aesthetics; Kant's philosophy of religion; Kant's philosophy of history; Kant's philosophy of law, state and politics; Kant's anthropology; Kant's nature philosophy and the opus postumum; Kant's logic; Kant and the Enlightenment; Kant, German Idealism and Neo-Kantianism; Kant and the consequences. Among the authors are Manfred Baum, Mario Caimi, Konrad Cramer, Jean Ferrari, Eckhardt Förster, Michael Friedman, Simone Goyard-Fabre, Paul Guyer, Gary Hatfield, Agnes Heller, Dieter Henrich, Otfried Höffe, Wolfgang Kersting, Béatrice Longuenesse, Onora O’Neill, Robert Pippin, Gerold Prauss und Michael Wolff.