Where is society going? What will the future look like?

In a number of prevoius blogs I've discussed where our relationships with intelligent machines may be taking us.  Now I would like to look in general at how society might develop in the future, first here on Earth and then later perhaps on other worlds.  In this first blog I start to ask why, despite modern communications, we continue to grow our cities?  Where is this going?  http://wp.me/p3ycbY-13l