In the vast tapestry of world history, countless emperors, philosophers, and scientists have emerged, each leaving their unique mark. However, since the moment a man named Jesus of Nazareth stepped onto this earth, history itself was cleaved in two. Time itself stands as a witness, divided into 'Before' and 'After' His birth (Galatians 4:4). For a long time, a profound question has lingered in my mind: "If Jesus Christ had never been born into this world, what would the society we see today look like?" This very question became the foundation of this book. While 19th-century philosophers like Friedrich Nietzsche argued that the world would have been a better place without Jesus, a careful and objective examination of the facts reveals a different truth. A world without Christ would be a realm of terrifying darkness (John 8:12). Through this book, I have sought to analyze—not just from a religious perspective, but through logical reasoning—how modern civilization, medicine, education, the dignity of women, and human rights have evolved due to the influence of Jesus Christ. This work demonstrates that these magnificent outcomes of Modern Civilization would not have been possible without the Divine Cause—Christ. By synthesizing the deep insights of Church of Christ scholars, historical evidences, and scriptural truths, I have structured each chapter systematically (2 Timothy 2:15). The primary objective of this book is to proclaim that Christ is not merely the founder of a religion; He is the "Light" and the "Life" of this world (John 1:4). Drawing special attention to the call in Matthew 11:28, the conclusion of this book emphasizes that for the modern human being, weary and heavy-laden, true rest is found in Christ alone. The Great "What If?": An Introduction What would have become of history if Jesus Christ had never entered this world? This question is not merely a hypothetical one; it is a vital question concerning our very existence. The birth of Christ approximately 2,000 years ago did not just change history—it "constructed" history. 1. Cultural & Philosophical Context: The Capra Film and Nietzsche's Argument The 1946 classic film, “It’s A Wonderful Life,” vividly demonstrates how chaotic and broken a world would be without its protagonist. Similarly, have you ever wondered what this world would be like if Christ had never existed? The Opposing View: The 19th-century German philosopher Friedrich Nietzsche argued that the world would have been a far better place had Jesus never been born. The Truth: Critics often point to historical atrocities committed in the name of Christianity, but the reality is that in a world without Christ’s influence, human life would have held no intrinsic value at all (Matthew 10:31; Luke 12:7). 2. Logical Reasoning: The Law of Cause and Effect According to the principles of logic, every effect must have a cause. The human rights, gender equality, and universal education we enjoy today are the "effects." The fundamental "cause" of these effects is the teachings of Christ. Without the cause (Jesus), these positive effects would simply not exist.