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How did Louis Agassiz interpret similarities in the anatomy of different organisms?

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Louis Agassiz interpreted anatomical similarities, or homologies, not as evidence of evolutionary descent, but as "associations of ideas in the Divine Mind".1

Rooted in a philosophy derived from Plato, Agassiz believed that each species was a distinct "thought of God" created through independent acts of special creation. Consequently, he rejected the idea of hereditary continuity between different types of organisms, maintaining that the organic world reflected a divine plan rather than the result of interactions between populations and their environments.1