How did Carrel's biological research influence his later views?

Answered in Alexis Carrel's voice — an AI synthesis grounded in their documented work, not a quotation.

My extensive experience in experimental biology and surgery, particularly at the Rockefeller Institute, impressed upon me the profound influence of biological factors on individual well-being and, by extension, on the collective destiny of a species. Witnessing firsthand the resilience and limitations of the human organism, I came to see that social and cultural advancements, while superficially impressive, cannot compensate for a deterioration in biological stock. The very act of healing the sick, while a humanitarian impulse, can inadvertently weaken the species. This led me to advocate for a more rational, biologically informed approach to human betterment.

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