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Agree totally with Matt-Antonino. This Moz post, by Dan Shure, was the one I found most helpful when trying to figure out how to index (or not index) pages and posts. http://moz.com/blog/setup-wordpress-for-seo-success The post speaks specifically to Wordpress, but concepts are transferable to any implementation.

I see, so for example: Foreign Authors Foreign Singers Travel Diaries I think it's getting closer, but i don't think people still search for Foreign Author per say. They just look for an author, or, who happens to be Foreign. It's not possible to distinguish based on these keyword the targeted sub-group, I think. All this made me think. Given that this is about exploration, somehow I need to get the right people with the right mindset on the site, and by EXPLORING, they will see content and choose what interests them. So the site would be kind of a cultural discovery tool. Let's take a Persona, for example: all I know is I want to see something interesting about other cultures or the world, I don't know if it's going to be an author specifically, a new song form malaysia, or an explanation of head bobbing in Indian culture.  I am curious and want to find something interesting. How would one target keywords (or plan an SEO, Social Media Strategy) for that?  Would you still apply your above suggestion of making a list of what would fall under it and create categories with key-word rich category urls, etc. ? I almost feel as if it's better to do content marketing: have cool posts shared elsewhere ( or guest post) that will lead the right kind of people back to the site. What do you think?