Brave New World by Aldous Huxley criticizes early 20th century society and issues that are still relevant today. The novel depicts a dystopian future where happiness is prioritized over things like religion and emotion. In this society, John is raised outside of it but is introduced to its ways which include no religion, instant gratification through drugs and sex, and manufactured happiness. John has a mental breakdown and rejects this society, leading to his isolation and eventual suicide. The novel examines themes of alienation, the superficial nature of happiness without meaning or purpose, and the importance of religion in connecting people.