Pericles is still available at GMT: https://www.gmtgames.com/p-587-pericles-the-peloponnesian-wars-460-400-bc.aspx
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https://www.youtube.com/watch?v=mm93zKjXG1k
David Stewart's Phases of Corporate Ownership: https://youtu.be/hwEd4_LFQv0
His books: https://www.amazon.com/s?i=digital-text&rh=p_27%3ADavid+V.+Stewart&s=price-asc-rank&qid=1628539870&text=David+V.+Stewart&ref=sr_st_price-asc-rank
Galaxy's Edge: https://www.amazon.com/s?k=galaxys+edge+series&i=digital-text&crid=IKS3S33WEO5&sprefix=Galaxy%2Cdigital-text%2C207&ref=nb_sb_ss_ts-doa-p_3_6
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https://www.youtube.com/watch?v=gyj8bCcJQ1A