As I read caves of steel, I came across “Each city became a semiautomous unit, economically all but self-sufficient. It could roof itself in, grid itself about, burrow itself under, it became a steel cave, a tremendous, self-contained cave of steel and concrete,” Page 15. This section caught my attention since it explains the reason for the title. Besides the title reference, the title “caves of steel,” refers to the city full of people unable to be free; trapped within the busy city, divisions of classes and etc.  This page stood out because it explains reasons behind the misery of the people in the city, as well as the given the title. The theme of the story is imprisonment; confined within the city of loss for the future, confined in a society of fear against the spacers and confined in a city of unwanted change. The fact that the city people don’t want changes makes them less likely to accept the spacers or gain any help from them. The lack of knowledge of outer world situation makes them afraid of moving forward. These people live their life working, fighting to keep their place within the city, lacks the interest to explore. They are concealed yet, they don’t want help; don’t want advanced technology, greater life force and a better world to live on from the spacers. The people are the ones concealing themselves in a cage of steel and concrete.