I don't ignore the last 20,000 years, but (for the most part) our genes do. So my argument about cities is basically sound. (See, e.g., http://www.boston.com/bo

I don't ignore the last 20,000 years, but (for the most part) our genes do. So my argument about cities is basically sound. (See, e.g., http://www.boston.com/bostonglobe/ideas/articles/2009/01/04/how_the_city_hurts_your_brain/. http://www.boston.com/bostonglobe/ideas/articles/2009/01/04/...) You might be right about suburbia, though; it can be quite isolating. N.B. I say this only because I myself misspelled it for years (right up until around 2000): "millennia" has double-ell, double-en. Since making this discovery, I've found that "millenni(um|a)" is misspelled ~20% of the time---and the present occurrence makes two just today!