Reason and Organism

Kant's concept of Organism seems to be derived from his Rational Idea, the 'Kingdom of Ends'. If so, then his focus on Purposiveness distracts him from a deeper problem with any Spinozist concept of Organism. The primary characteristic of Reason, Purposive or otherwise, is its non-contradictoriness. Hence, a Nature that is a product of Reason should be conflict-free. And, yet, Spinoza affirms that one part of Nature can be harmful to another. So, the question for Spinozism is not 'how are organisms possible?', but 'how are non-organistic entities possible?, and it is unclear that he has a satisfactory answer.