»Harmonious Life. Reflection on Determining the Relationship between Happiness and Morality in Connection to Immanuel Kant«: The study investigates the ethical relationship between happiness and morality in Kant, and argues for the following claim: While rejecting an Incompatibility-Thesis, a Dissonance-Thesis and a Coincidence-Thesis Kant defends a dissonant Harmony-Thesis as the most plausible answer to the fundamental ethical question whether and to what extent morality can lead us to happiness. It thus updates the ethical relevance of Kant's autonomous morality for happiness as a good life.