Which American author viewed the Gilded Age as a time of ridiculous excess?

Mark Twain is the American author who viewed the Gilded Age as a time of ridiculous excess. He famously coined the term "Gilded Age" to describe the period, highlighting the stark contrast between the era's surface glamour and underlying social issues such as corruption, inequality, and moral decay. Twain's works often satirized the extravagance and greed of society during this time, critiquing the values that prioritized wealth over integrity.