This lecture discusses key ideas from the ancient philosopher Plato's work, The Republic, in particular book 1. Specifically it examines specifically the "traditional" conception of justice articulated by Polemarchus there -- a view which says justice is doing good to friends and bad to enemies. To support my ongoing work, go to my Patreon site - www.patreon.com/sadler If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM You can find over 3000 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler You can get a copy of Plato's Republic here - amzn.to/2wHmi3p