What is the theme in Welcome to the Monkey House by Kurt Vonnegut?

Vonnegut's exploration of the future in this collection is, for the most part, cautionary. Each story set in the future gives a detailed account of what the world is like in the given future year. All the details given are negative, but they are presented either in the positive light of progress, or as the only way things could possibly be. "Unready To Wear," "Harrison Bergeron," "Welcome to the Monkey House," and "Tomorrow and Tomorrow and Tomorrow" are all set in the future.