This paper is about Brentano’s philosophical program in Vienna and the overall architecture, which binds together the main parts of his philosophy. I argue that this program is based on Brentano’s project of philosophy as science and it aims to account for the unity of the main branches of his philosophy. The paper is divided into six parts. The first bears on Brentano’s philosophy of history, which is an important piece of the program. The second is on the close relationship (...) between philosophy and science, and the third is on Brentano’s classification of theoretical sciences. In the three remaining parts of the paper, I examine the two main axes of the program, i.e. psychology and metaphysics, and the question how the three normative sciences are rooted in psychology. In the conclusion, I argue that Brentano’s theory of the four phases in the history of philosophy provides his philosophical program with a justification. (shrink)

In this paper, I will describe how Brentano was able to integrate descriptive philosophy and logical analysis fruitfully by pointing out Brentano’s concept of philosophy as a rigorous science. First I will clarify how Brentano attempted to turn philosophy into a rigorous descriptive science by applying scientific methods to philosophical questions. After spelling out the implications of such a descriptive understanding of philosophy, I will contrast this descriptive view of philosophy with a semantic-analytic understanding of philosophy as proposed by Frege. (...) After having thus set the stage I will argue that the current separation of philosophy into the seemingly antithetical strands of phenomenology and analytic philosophy may be seen as a consequence of how the term ‘rigorous science’ in ‘philosophy as a rigorous science’ is interpreted: Does a rigorous science grasp its object with as much exactitude as possible? Or is a science rigorous when its theories are expressed unambiguously, and their implications are drawn with precision? In the course of this investigation I will also point out how Brentano’s integrative use of descriptive philosophy and analysis can provide a suitable starting point for an equally successful integration of these methods in contemporary philosophy. (shrink)