I've researched your question, and I couldn't seem to find an answer. There isn't much detail to this information for this book, however I'm sure researching books and other material you can find this answer. This book is definitely unique in its own way, especially since it deals with such a big cause such as equality. How would it be if men and women weren't equal today? It would be such a difference if we didn't have authors that wrote about their opinion about such a subject.