It was intended for new people on LW, who should be introduced to our "community values" (even without reading the whole Sequences). Also for smart people outside LW, who are curious what is LW about; and might decide to join later.
In both cases, the goal is make clear what LW (and x-rationality) is, and what it is not, in a short amount of text. Perhaps writing a new text would be better, but making a selection of existing text should be quicker.
"Politics is the Mind-Killer" and "Well-Kept gardens die by pacifism" seem particularly relevant to online communities, for instance.
Yes, but I think they also apply well offline. People can discuss politics in person, too. The lesson of well-kept gardens is indirect: some people are net loss, and if you don't filter them out of your social network, your quality of life will go down.
Now I added some explanations to my list, so the message is like this:
If it's worth saying, but not worth its own post, even in Discussion, it goes here.