[Update: and now there's a fifth discussion thread, which you should probably use in preference to this one. Later update: and a sixth -- in the discussion section, which is where these threads are living for now on. Also: tag for HP threads in the main section, and tag for HP threads in the discussion section.]
The third discussion thread is above 500 comments now, just like the others, so it's time for a new one. Predecessors: one, two, three. For anyone who's been on Mars and doesn't know what this is about: it's Eliezer's remarkable Harry Potter fanfic.
Spoiler warning and helpful suggestion (copied from those in the earlier threads):
Spoiler Warning: this thread contains unrot13'd spoilers for Harry Potter and the Methods of Rationality up to the current chapter and for the original Harry Potter series. Please continue to use rot13 for spoilers to other works of fiction, or if you have insider knowledge of future chapters of Harry Potter and the Methods of Rationality.
A suggestion: mention at the top of your comment which chapter you're commenting on, or what chapter you're up to, so that people can understand the context of your comment even after more chapters have been posted. This can also help people avoid reading spoilers for a new chapter before they realize that there is a new chapter.
This is something of a quibble, but you really shouldn't think of species-level selection as a kind of group selection. In both group and individual selection, it is the species that evolves. But in species-level selection, the species does not evolve. It is selected - it either lives or dies.
Another key difference - the usual argument against group selection is that it is ineffective since individual selection is a stronger force. That is, individual selection is said to push harder and change the species more than does group selection. But comparing species-level selection and individual selection, it makes no sense to say that one is more powerful than the other. They are playing different games.
My apologies. Most theorists say species selection is a subclass of group selection; but Stephen J. Gould says it is not. See the long explanation here.
That is true if you're talking about features that groups have and individuals don't, or traits that aren't inherited genetically. But all the literature on group selection is about the competition between individual and group (including species) selection, within the same game of selecting genes.