Free-Thinkers are a Government's Worst Enemy.

The first book to come to my mind that involves the right to think freely was The Night Thoreau spent in Jail. I believe this book is a right example because it talks about both transcendentalism and civil disobedience which makes Thoreau a free thinker you know how he was against what the society was turning into and believed the world shouldn't change into something that wasn't like the beginning of time. The book I'm reading now called "Inherit the Wind" also involves free-thinkers about a character who wants to believe that people should believe everything about the Bible is literally true.