What does the writer use to prove that Erewhon was once as modern as you are today?

The writer of "Erewhon" uses various examples of advanced technology, social structures, and cultural practices in the fictional society to suggest that Erewhon was once as modern as our society today. These include intricate laws and regulations, sophisticated machinery, and complex institutions reflecting a high level of civilization. Additionally, the author emphasizes the cyclical nature of progress and regression in Erewhon's history, implying that their society has gone through stages similar to our own.