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https://www.vatican.va/content/benedict-xv/en/encyclicals/documents/hf_ben-xv_enc_01111914_ad-beatissimi-apostolorum.html
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https://www.city-journal.org/ending-crony-capitalism?utm_source=newsletter&utm_medium=email&utm_campaign=16%2C08%2C21+(Copy)
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https://scholar.harvard.edu/files/aghion/files/social_origins_of_inventors.pdf