What are the motifs in The Emperor's Children by Claire Messud?

The rich are a recurring idea in the book. The rich and entitled in this book are the Thwaite family, David Cohen and his family, and Manhattan. The characters standing outside of that enchanted circle and wanting desperately to be part of it are Julius, Danielle, and Bootie. The characters who are happy with their own lives are Judy Tubb, Annabel Thwaite, and Randy Minkoff.