… you could do worse than watch this series of lectures by Harvard professor Michael Sandel (thanks to Shashank Chauhan for the tip). The topic is “justice,” and the lectures are nicely focused and entertaining.
If you’re looking for some philosophy lectures over those long summer months…
USUPhilosophy 
These podcasts are very accessible. Sandel does a fantastic job of presenting classic arguments from influential figures from Locke to Aristotle. I have an uncle that is always asking me why I am not a libertarian. I made sure to direct him to these web lectures.
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