Mark twain's sarcastic name for the post-civil war era?

Answer 1

He called it the Gilded Era/Age to hint at the grime that lay beneath America's new wealth.There were tons of millionares who spent their money lavishly and foolishly while other people lived in crowded, disease-filled slums and worked for as little as 7 cents a day.

Answer 2

Mark Twain sarcastically referred to the post-Civil War era in the United States as the "Gilded Age," suggesting that while the period appeared to be prosperous and shiny on the surface, it actually concealed widespread corruption and inequality.

Answer 3

The Gilded Age. He also co-authored a book that used that phrase as the title.
The Gilded Age.

And he co-authored a book with that as it's title.