system
Given the following post, respond as if you're commenting on Reddit:
human
Which topics are trending in contemporary political theory/philosophy?

I'm particularly interesting in *novel* issues which are being debated *now*, rather than merely during the last decade or so.
gpt
Some new and interesting work is being done on the moral limits of markets. For instance, even if certain transactions are entirely voluntary, some philosophers hold that there are certain moral limits on what can be bought and sold.

Debra Satz from Stanford has a book called *Why Some Things Should Not be for Sale* (2010). Sandel has *What Money Can't Buy: The Moral Limits of Markets* (2012). Brennan and Jaworski have a defense of markets in *Markets without Limits* (2015).