If you’re a professional philosopher, you’ve probably heard of Brentano as the thinker who reintroduced the notion of intentionality into modern philosophy. If you’re not a professional philosopher, you’ve probably never heard of him. But Brentano’s philosophical work expands far beyond the theme of intentionality and constitutes in fact a complete philosophical system, with well worked out and strikingly original theories in every major area of philosophy. The purpose of this article is to provide a panoramic yet digestible overview of (...) Brentano’s contributions in most areas of philosophy, with greater focus on theoretical philosophy. The article is written to be understood without any background in philosophy, and in fact may double as an introduction to the various branches philosophy itself. (shrink)