Is free speech dead in America? A new report has found that last year more than a thousand authors were banned in US schools. Some warn censorship is again rearing its ugly head.
Growing list of books banned in US schools
Are you there God? Judy Blume's 1970 novel has been read by generations of teenagers. Glossary
Catholic Church - The word Catholic means "universal". A Christian denomination with over a billion followers worldwide, led by the Pope.
Voltaire - A French enlightenment writer, historian and philosopher known for his criticism of Christianity and slavery.
Immanuel Kant - A German Enlightenment philosopher who is regarded as one of the most important thinkers of the modern era. He fundamentally changed the way we think about a variety of subjects, from aesthetics to cognition to morality.
Simone de Beauvoir - A French feminist philosopher best known for her book The Second Sex.