The communities of 100 years ago were laid out so people could walk from where they lived to where they shopped, worked, and worshiped in the same compact neighborhood.  The development pattern that became popular after World War II separated all these activities so commercial development became unconnected and uncoordinated along thoroughfares, and subdivisions are isolated from places to work and shop.  In other words, everything is a drive away.  Integrating uses allows people once again to live within walking distance of many activities of daily living and gives independence to those who do not drive. This allows small-scale commercial and residential activities to co-exist, either in the same building or adjacent buildings.