The Question and Answer section for Cry, the Beloved Country is a great resource to ask questions, find answers, and discuss the novel.
GradeSaver has an entire page dedicated to the themes of Cry the Beloved Country readily available for your use. Simply follow the direct link to the study guide and choose "Themes" on the laft hand side of the page.
Check this out:
Sorry, this is only a short answer space. Your questions need a lot of detail.