Was Brentano a Systematic Philosopher?

In a series of recent contributions it has been argued that Franz Brentano’s philosophical position constituted a unified system; Uriah Kriegel has called Brentano's philosophy as “the last grand system of Western philosophy”. The goal of the present paper is to scrutinise this claim and shed light on Brentano's methodological approach and his style of reasoning. I pay particular attention to two aspects: Brentano’s view that philosophy should be done in a rigorous, scientific manner and the fragmentary character of Brentano’s work. I argue that both aspects stand in contrast to the very idea of system-philosophy: the maxim that philosophy should adopt the method of the natural sciences was intended by Brentano as a way of distancing himself from system-philosophy; while the fragmentary character of Brentano’s work does not fulfill the aspiration of system-philosophy to provide an answer to everything. Yet, the incompleteness of his work is not an arbitrary or contingent aspect; it is rather a necessary side-effect of his methodological views.