This cumulative course on Johannes Heinrichs’ philosophical works presents the essence of his previous publications: A rich, consistent, and novel monolithic system defying temptations by the zeitgeist. Starting with an emphasis on reflection as the basis of epistemology, Heinrichs also covers the mind-body dualism in an anthropology chapter, moves on to presenting summaries of his Theory of Democracy as well as of his Philosophical Semiotics, followed by an outline of structural and integral ontology. An overview of ethical positions in the final chapter proves the fertility of Heinrichs’ theoretical-reflection methods.