From the 17th to 18th centuries, bold thinkers cast off the authority of ancient traditions and embraced reason as the primary tool for understanding the world. These rationalists, or early modern philosophers, included René Descartes, Baruch Spinoza, and Gottfried Wilhelm Leibniz—visionaries whose answers to profound questions remain relevant today. Early Modern Philosophy: Descartes and the Rationalists covers the key philosophers of this period in 12 fascinating half-hour lectures, presented by award-winning teacher James D. Reid, Professor of Philosophy at Metropolitan State University.

Many Americans know that our nation’s founders drew inspiration from the political systems of ancient Rome and Greece. But what exactly were these influences? And did they shape the United States in far-reaching ways? In these 24 compelling lectures, Professor Winterer takes you on a journey into the thought and actions of the American revolutionaries, showing how classical antiquity shaped every aspect of the revolutionary and founding era.

Religion is foundational to what it means to be human. Our quest for meaning is as ancient as our very existence, stretching back to a time when Neanderthal burials and Paleolithic figurines suggest our ancestors recognized a power that transcended visible reality. From ancient civilizations to the 21st century, belief in a higher power seems to be a universal human instinct. These 12 thought-provoking lectures introduce you to the world of comparative religion, giving you insights into a variety of religious expressions and human cultures.

In Communism in Decline: From Sputnik to Gorbachev, Professor Vejas Gabriel Liulevicius reveals the internal and external forces that ripped apart the grand communist experiment. What were the mistakes made by the Soviet leaders who believed too deeply in their own propaganda? And why were they not able to see the many ironies in their own poor decisions? In 12 fascinating lectures, you will learn how the Soviet Union went from winning the space race against the United States in 1957 to Gorbachev’s resignation and the dissolution of the great experiment in 1991.

Many Americans remember a family road trip to visit one of our 63 national parks. Why did Americans start preserving these sites of natural and historic interest? How were these parks selected, and what steps did conservationists, activists, philanthropists, politicians, and others take to protect millions of acres against the booming developments of an expanding nation? An award-winning writer, researcher, and American Studies scholar, Dr. Megan Kate Nelson tackles these questions as she takes you on a marvelous journey through some of the most beautiful places on Earth.

The 24 revealing lectures of Unsung Heroes of the Ancient World reconstruct over a dozen biographies from the classical world—most of them little-known, some of them quite unlikely heroes. With Professor Emeritus Gregory Aldrete as your expert guide, you will meet the ambitious travel writers, dedicated engineers, careful cartographers, diligent farmers, woman philosophers, devoted wives, skilled military generals, African rebels, Persian kings, and impressive athletes who stood out among their peers centuries ago.

In the summer of 1754, deep in the wilderness of western Pennsylvania, a very young George Washington suffered his first military defeat, and a centuries-old feud between Great Britain and France was rekindled. The war that followed would be fought across virgin territories, from Nova Scotia to the forks of the Ohio River, and it would ultimately decide the fate of the entire North American continent—not just for Great Britain and France but also for the Spanish and Native American populations.

The promise of America is that the country is based on an idea, one where everyone is created equal and equally free to chart their own course. From 13 newly independent states ratifying a national constitution to the heated debates in the halls of Congress today, American politics is about negotiation over what our country is—and where we are going.

For most of history, humans did without refined sugar. Granulated sugar was first produced in India around the sixth century BC, yet for almost 2,500 years afterward sugar remained marginal in the diets of most people. Then, suddenly, it was everywhere. How did sugar find its way into almost all the food we eat, fostering illness and ecological crisis along the way? The World of Sugar begins with the earliest evidence of sugar production.

In the 12 fascinating lectures of Warping Reality: Inside the Psychology of Cults, you will learn about some of the most widely known cults of modern times. But unlike any standard news reporting or documentary about the Peoples Temple, The Manson “Family,” The Branch Davidians, Heaven’s Gate, Children of God, the Unification Church, and NXIVM, your expert, Dr. Wind Goodfriend, will help you explore the psychology of these cults. How could these cult leaders have committed such heinous crimes under the guise of “helping” members in their development?

We tend to think of the Middle Ages as a dark, backward, and unchanging time characterized by violence, ignorance, and superstition. By contrast, we believe progress arose from science and technological innovation, and that inventions of recent centuries created the modern world. We couldn't be more wrong.

World War II is usually seen as a titanic land battle, decided by mass armies, most importantly those on the Eastern Front. Phillips Payson O'Brien shows us the war in a completely different light. In this compelling new history of the Allied path to victory, he argues that in terms of production, technology, and economic power, the war was far more a contest of air and sea than of land supremacy.

For millennia, philosophers and scientists have been trying to unlock the secrets of the mind with only limited success—until now. Today, with modern technologies including the best in neuroscience, medical imaging, and recent advances in artificial intelligence, we are making more progress than ever before. In Introduction to Cognitive Science, Professor Thad A. Polk takes you on a fascinating tour of the latest discoveries in the relatively new field of cognitive science. In 24 exciting lectures, Professor Polk shares dozens of the most challenging questions in cognitive science today.

This audiobook narrated by acclaimed archaeologist and best-selling author Eric Cline offers a breathtaking account of how the collapse of an ancient civilized world ushered in the first Dark Ages.

Accompanied by a selection of guests, Professor Jortner takes you through a mind-bending exploration of the history that could have been. Captivating storytellers and imaginative thinkers, these experts show how history is contingent on split-second decisions, near misses, and sheer dumb luck. By reflecting on what didn’t happen, 10 Great What-Ifs of American History gives you new insights on what did happen—and the impact on our world today.

My Big TOE: Awakening, written by a nuclear physicist in the language of contemporary culture, unifies science and philosophy, physics and metaphysics, mind and matter, purpose and meaning, the normal and the paranormal. The entirety of human experience (mind, body, and spirit) including both our objective and subjective worlds is brought together under one seamless scientific understanding.

Chemistry and Our Universe: How It All Works is your in-depth introduction to this vital field, taught through 60 engaging half-hour lectures that are suitable for any background or none at all. Covering a year’s worth of introductory general chemistry at the college level, plus intriguing topics that are rarely discussed in the classroom, this amazingly comprehensive course requires nothing more advanced than high-school math. Your guide is Professor Ron B. Davis, Jr., a research chemist and award-winning teacher at Georgetown University.

Richard Dawkins' brilliant reformulation of the theory of natural selection has the rare distinction of having provoked as much excitement and interest outside the scientific community as within it. His theories have helped change the whole nature of the study of social biology, and have forced thousands to rethink their beliefs about life.

How the Earth Works takes you on an astonishing journey through time and space. In 48 lectures, you will look at what went into making our planet - from the big bang, to the formation of the solar system, to the subsequent evolution of Earth.

We are in the midst of a global mental health crisis, and mental illnesses are on the rise. But what causes mental illness? And why are mental health problems so hard to treat? Drawing on decades of research, Harvard psychiatrist Dr. Chris Palmer outlines a revolutionary new understanding that for the first time unites our existing knowledge about mental illness within a single framework: mental disorders are metabolic disorders of the brain. Brain Energy will transform the field of mental health, and the lives of countless people around the world.

Astrophysicist Neil deGrasse Tyson has attracted one of the world’s largest online followings with his fascinating, widely accessible insights into science and our universe. Now, Tyson invites us to go behind the scenes of his public fame by unveiling his candid correspondence with people across the globe who have sought him out in search of answers. In this hand-picked collection of 100 letters, Tyson draws upon cosmic perspectives to address a vast array of questions about science, faith, philosophy, life, and of course, Pluto.

Hilarious, fascinating, and a roller coaster of dizzying, historical what-ifs, Napoleon's Hemorrhoids is a potpourri for serious historians and casual history buffs. In one of Phil Mason's many revelations, you'll learn that Communist jets were two minutes away from opening fire on American planes during the Cuban missile crisis, when they had to turn back as they were running out of fuel. You'll discover that before the Battle of Waterloo, Napoleon's painful hemorrhoids prevented him from mounting his horse to survey the battlefield.

Dr. Catherine Kleier invites us to open our eyes to the phenomenal world of plant life and to the process she calls “Natura Revelata”, the joy of celebrating and learning from the secrets of nature. As Dr. Kleier shares her knowledge with contagious excitement for her subject, she emphasizes the middle ground: Instead of focusing on cell microbiology or the study of ecosystems and habitats, she stresses the basic biology, function, and the amazing adaptations of the plants we see all around us.

In this illuminating audiobook, Tyson and coauthor James Trefil, a renowned physicist and science popularizer, take on the big questions that humanity has been posing for millennia - How did life begin? What is our place in the universe? Are we alone? - and provide answers based on the most current data, observations, and theories.

At the end of his career, Albert Einstein was pursuing a dream far more ambitious than the theory of relativity. He was trying to find an equation that explained all physical reality - a theory of everything. Experimental physicist and award-winning educator Dr. Don Lincoln takes you on this exciting journey in The Theory of Everything: The Quest to Explain All Reality. Suitable for the intellectually curious at all levels and assuming no background beyond basic high-school math, these 24 half-hour lectures cover recent developments at the forefront of particle physics and cosmology.

Here is Peter Caddick-Adams's third volume in his trilogy about the final year of the Western front in World War Two. Fire & Steel covers the war's final 100 days—beginning in late January 1945 and continuing until May 8, 1945, when the German high command surrendered unconditionally to all Allied forces. Caddick-Adams's previous two volumes in the acclaimed series—Sand & Steel, which covers the invasion of Normandy in June 1944, and Snow & Steel, the definitive study of the Battle of the Bulge—have set the stage for this concluding volume.

This audiobook narrated by acclaimed archaeologist and best-selling author Eric Cline offers a breathtaking account of how the collapse of an ancient civilized world ushered in the first Dark Ages.

We tend to think of the Middle Ages as a dark, backward, and unchanging time characterized by violence, ignorance, and superstition. By contrast, we believe progress arose from science and technological innovation, and that inventions of recent centuries created the modern world. We couldn't be more wrong.

In the summer of 1754, deep in the wilderness of western Pennsylvania, a very young George Washington suffered his first military defeat, and a centuries-old feud between Great Britain and France was rekindled. The war that followed would be fought across virgin territories, from Nova Scotia to the forks of the Ohio River, and it would ultimately decide the fate of the entire North American continent—not just for Great Britain and France but also for the Spanish and Native American populations.

Mao Zedong threw his country into a frenzy with the Great Leap Forward, an attempt to catch up with and overtake the West in less than fifteen years. It led to one of the greatest catastrophes the world has ever known. Dikotter's extraordinary research within Chinese archives brings together for the first time what happened in the corridors of power with the everyday experiences of ordinary people, giving voice to the dead and disenfranchised. This groundbreaking account definitively recasts the history of the People's Republic of China.

Authoritative and immediate, this is the classic account of the most powerful of the American Indian tribes. T. R. Fehrenbach traces the Comanches' rise to power, from their prehistoric origins to their domination of the high plains for more than a century until their demise in the face of Anglo-American expansion.

In the second half of the tenth century, Byzantium embarked on a series of spectacular conquests. By the early eleventh century, the empire was the most powerful state in the Mediterranean. Yet this imperial project came to a crashing collapse fifty years later, when political disunity, fiscal mismanagement, and defeat at the hands of the Seljuks and the Normans brought an end to Byzantine hegemony. By 1081, Byzantium's very existence was threatened.

For most of history, humans did without refined sugar. Granulated sugar was first produced in India around the sixth century BC, yet for almost 2,500 years afterward sugar remained marginal in the diets of most people. Then, suddenly, it was everywhere. How did sugar find its way into almost all the food we eat, fostering illness and ecological crisis along the way? The World of Sugar begins with the earliest evidence of sugar production.

The Bloods were one of America’s first and most expansive pioneer families. They explored and laid claim to the frontiers―geographic, political, intellectual, and spiritual―that would become the very core of the United States. John Kaag’s American Bloods is the account of a remarkable American family, of its participation in the making of a nation, and of how its members embodied the elusive ideals enshrined in the Declaration of Independence.

In August 1945, a handful of people raised a homemade cotton flag and announced the birth of a new nation. With the fourth largest population in the world, inhabiting islands that span an eighth of the globe, Indonesia became the first country to rid itself of colonial rule after WWII.

In 1940, the German army fought and won an extraordinary battle with France in six weeks of lightning warfare. With the subtlety and compulsion of a novel, Horne's narrative shifts from minor battlefield incidents to high military and political decisions, stepping far beyond the confines of military history to form a major contribution to our understanding of the crises of the Franco-German rivalry.

In the fourth century AD, a new faith exploded out of Palestine. Overwhelming the paganism of Rome, and converting the Emperor Constantine in the process, it resoundingly defeated a host of other rivals. Almost a thousand years later, all of Europe was controlled by Christian rulers, and the religion, ingrained within culture and society, exercised a monolithic hold over its population. But, as Peter Heather shows in this compelling new history, there was nothing inevitable about Christendom's rise to Europe-wide dominance.

It is rare for life to change Earth, yet three organisms have profoundly transformed our planet over the long course of its history. Elemental reveals how microbes, plants, and people used the fundamental building blocks of life to alter the climate, and with it, the trajectory of life on Earth in the past, present, and future. Taking listeners from the deep geologic past to our current era of human dominance, Stephen Porder focuses on five of life’s essential elements—hydrogen, oxygen, carbon, nitrogen, and phosphorus.

Written by a leading historian of Latin America, Conquistadors and Aztecs offers a timely portrayal of the fall of Tenochtitlan and the founding of an empire that would last for centuries.

Many Americans know that our nation’s founders drew inspiration from the political systems of ancient Rome and Greece. But what exactly were these influences? And did they shape the United States in far-reaching ways? In these 24 compelling lectures, Professor Winterer takes you on a journey into the thought and actions of the American revolutionaries, showing how classical antiquity shaped every aspect of the revolutionary and founding era.