Is it a purely linear trend? I would think it'd be more curvilinear, where "happiness" (defined how?) hits a peak at a certain level of density and then goes back down as density increases further.
Stress from noise and pollution could be a problem for some. The sirens wail around here all the time. Somebody had an axe split their skull a block away. Very stressful.
Naturally, you can only choose one. One species, one habitat option. Heaven forbid we should succumb to the moral relativism of "Gee, maybe some people like to live in the country, too." Keep up your noble jihad, Charles! You'll forcibly urbanize those rural dead-enders yet!
While people may come in different temperaments, intelligence levels, genders, sexual orientations, religions, levels of sociability, interests, hobbies, worldviews and politics, all people are happier in a dense city.
Charles keeps banging on this theme. I'm on the 'I need space' team. "All people are happier in a dense city?" Total bullshit. I've been there and I'm not. Oh, and I don't think Charles has ever answered a simple question after he posts yet again about micro-apartments. How many square feet is your place, Charles?
http://www.who.int/bulletin/volumes/87/2…
http://nihrecord.od.nih.gov/newsletters/…
http://en.wikipedia.org/wiki/Behavioral_…
Apple, Microsoft, Facebook, Google
All. Of. Them.
Hasn't that always been the case?
And of course, everybody is exactly the same and will be happy in the exact same environment.