What is the main conflict in The Hidden Dimension by Edward T. Hall?

All species in the animal kingdom have basic underlying organizational systems which allow them to survive and reproduce their own. One such system is the use of space. Man can be studied relative to the use of space around himself, in relationships with other humans, and in the cities, homes, and offices he constructs. The Hidden Dimension is such a study, providing a detailed evolutionary progression of the use of space, as well as the particular difficulties man, and specifically Americans, have wrought by the lack of understanding of what space means to all cultural groups on the planet.