Community is not something you have, like pizza. Now is it something you can buy. It's a living organism based on a web of interdependencies- which is to say, a local economy. It expresses itself physically as connectedness, as buildings actively relating to each other, and to whatever public space exists, be it the street, or the courthouse or the village green.
Americans threw away their communities in order to save a few dollars on hair dryers and plastic food storage tubs, never stopping to reflect on what they were destroying.