This monograph discusses the importance of A. L. Hülsen's only book for the history of early German idealism. The Wissenschaftslehre is Fichte's "response" to the objections of Schulze-Aenesidemus to Reinhold's early Elementarphilosophie. Hülsen, a Fichtean thinker, restructured many aspects of Reinhold's system which Fichte left intact. In 1797, Fichte recognized Hülsen as a partner in the development of his system, thus acknowledging his contribution to the emergence of German idealism.