Original sentence: His approach differs in essence from [Luhmann's theory of social systems] because Parsons rejects the idea that systems can be autopoietic, short of the actual action system of individual actors.While Luhmann focused on the systemic immanence, Parsons insisted that the question of autocatalytic and homeostatic processes and the question about the actor as the ultimate "first mover" on the other hand was not mutually exclusive
Edited sentence: His approach differs in essence from Niklas Luhmann's theory because Parsons rejects the idea that systems can be autopoietic, short of the actual action system of individual actors.While Luhmann became caught up in sheer systemic immanence, Parsons insisted that the question of autocatalytic and homeostatic processes and the question about the actor as the ultimate "first mover" on the other hand was not mutually exclusive