Titans of Time: 25 Lives That Shaped the World by Dr. Tim Johnson, OD, is a captivating exploration of 25 extraordinary individuals whose actions transformed history and continue to resonate in our modern world. Published in May 2025 by Johnson Vision Press, this 400-page book weaves a global tapestry of influence, spanning law, philosophy, science, and activism across three pivotal eras: the Ancient World, the Medieval and Early Modern Era, and the Modern Era. From Hammurabi's groundbreaking legal code to Ada Lovelace's visionary computing insights, each figure's story is a testament to the power of one person to shape civilization. Dr. Johnson, an optometrist with a passion for history, brings a unique perspective, drawing parallels between these titans' challenges and today's crises-climate change, technological upheaval, and social divides. The book's 25 chapters, each roughly 14 pages, blend vivid storytelling, rigorous scholarship, and modern relevance, enriched with maps, portraits, and sidebars on controversies and fun facts. The selection prioritizes transformative impact, global diversity, and gender balance, countering Eurocentric narratives with voices from Mesopotamia, China, Africa, and beyond. Part I: The Ancient World introduces five foundational figures: Hammurabi, whose 1754 BCE Code laid the groundwork for modern justice; Confucius, whose ethics shaped East Asian governance; Cleopatra, whose diplomacy preserved Egypt against Rome; Socrates, whose questioning birthed Western philosophy; and Ashoka, whose Buddhist reforms spread nonviolence across Asia. These stories address timeless needs-order, harmony, power, truth, and compassion-offering lessons for 2025's legal reforms, geopolitical tensions, and peace movements. Part II: The Medieval and Early Modern Era profiles seven visionaries, including Muhammad, whose spiritual and political leadership unified Arabia; Charlemagne, who forged a European identity; Mansa Musa, whose wealth elevated African scholarship; Joan of Arc, whose courage rallied France; Leonardo da Vinci, whose Renaissance genius inspired innovation; Queen Elizabeth I, whose diplomacy strengthened England; and Gutenberg, whose printing press democratized knowledge, paving the way for the information age. Part III: The Modern Era examines 13 figures who shaped today's world, from Isaac Newton's scientific revolution to Nelson Mandela's reconciliation in South Africa. Highlights include Mary Wollstonecraft's feminist advocacy, Abraham Lincoln's emancipation, Karl Marx's economic critiques, Marie Curie's radioactivity breakthroughs, Mahatma Gandhi's nonviolent resistance, Albert Einstein's relativity, Rosa Parks' civil rights spark, Alan Turing's computing foundations, and Ada Lovelace's algorithmic foresight, each addressing issues like equality, technology, and justice that echo in 2025. The book's strength lies in connecting past to present. Hammurabi's laws inform modern courts, Confucius' ethics guide governance, and Turing's work underpins AI debates. These stories aren't just history-they're a call to action, showing how individuals, from kings to seamstresses, can bend history's arc. Ideal for readers curious about change, Titans of Time inspires with its message: one life, one choice, can alter the world.