The reason why some people criticized postwar society in the United States is because they thought it "lacked direction," since many people seemed to only be interested in their own pleasures.
-They feared that everyone was becoming too materialistic and where consumers buying unnecessary things
Explanation;
-The postwar society was very conformed and citizens were materialistic. Critics believed that these citizens had given up their right to be themselves. They also believed that the newly developed suburbs and shopping centers didn't make things better. It was pointed out that not everyone was able to benefit from the economic progress.
Answer: the mosaics in San Vitale differ from the rest of the structures and artworks we have seen because they are all about god being on their side and having imperial might.