Self-reliance is necessary for maintaining one's dignity

Any insight on the following topic?

In One Day in the Life of Ivan Denisovich, Alexander Solzhenitsyn includes interactions involving food and work in order to explore the theme, self-reliance is necessary for maintaining one's dignity.

Or subtopics?

Solzhenitsyn's descriptions of the methods by which the prisoners obtain food demonstrate the idea of self-reliance as a necessary trait for maintaining one's dignity.

Besides including the means by which the zeks obtain their food, Solzhenitsyn also discusses what the zeks do with their food in order to show self-reliance's importance in maintaining one's dignity.

In addition to descriptions of food, Alexander Solzhenitsyn also discusses the approach prisoners take to their work as a means of demonstrating the necessity of self-reliance in maintaining one's dignity.