Voltaire is considered one of those who inspired the French Revolution. He is a critic of the situation, and his views led him to be imprisoned more than once. In this book, “Philosophical Letters,” he criticizes the ideas of his time, and especially attacks the systems of France, its nature, literature, and politics. This book was one of the factors influencing the revolution and the refinement of man, so it was considered one of the most influential books in people’s souls.