Candidates for "Greatest Impact":
* The Bible: This collection of sacred texts has shaped the beliefs, morals, and history of billions of people across the globe. It has influenced art, literature, law, and social structures for millennia.
* The Quran: The central religious text of Islam, the Quran has had a profound impact on the lives of Muslims worldwide, shaping their faith, culture, and governance.
* The Communist Manifesto: This political treatise by Karl Marx and Friedrich Engels has had a significant impact on political thought and action, inspiring revolutions and shaping global political ideologies.
* On the Origin of Species by Charles Darwin: This scientific masterpiece revolutionized our understanding of biology and the natural world, challenging established beliefs and contributing to the development of modern evolutionary theory.
* The Lord of the Rings: J.R.R. Tolkien's epic fantasy novel has captivated readers for generations, inspiring countless works of art and influencing the genre of fantasy literature.
* The Little Prince: This beloved children's story by Antoine de Saint-Exupéry has touched the hearts of readers of all ages with its timeless themes of love, friendship, and the search for meaning.
* Sapiens: A Brief History of Humankind: Yuval Noah Harari's book offers a unique and insightful perspective on human history, prompting reflection on our species' past, present, and future.
Ultimately, the "greatest impact" is a matter of opinion. Each of these books, and many others, has touched lives, sparked discussions, and shaped the course of history. Their impact continues to resonate in our world today.