Aristotle wrote on everything from the shape of seashells to sterility, from speculations on the nature of the soul to meteorology, poetry, art, and even the interpretation of dreams. Apart from mathematics, he transformed every field of knowledge that he touched. Above all, Aristotle is credited with the founding of logic. When he first divided human knowledge into separate categories, he enabled our understanding of the world to develop in a systematic fashion.

Just a century after it had begun, philosophy entered its greatest age with the appearance of Socrates, who spent so much of his time talking about philosophy on the streets of Athens that he never got around to writing anything down. His method of aggressive questioning, called dialectic, was the forerunner of logic; he used it to cut through the twaddle of his adversaries and arrive at the truth. Rather than questioning the world, he believed, we would be better off questioning ourselves.

Immanuel Kant taught and wrote prolifically about physical geography yet never traveled further than forty miles from his home in Kvnigsberg. How appropriate it is then that in his philosophy he should deny that all knowledge was derived from experience. He insisted that all experience must conform to knowledge. According to Kant, space and time are subjective; along with various "categories," they help us to see the phenomena of the world, though never its true reality.

Rene Descartes spent most of his childhood in solitude, a situation that also came to characterize his adult life. Fortunately, these countless lonely hours helped Descartes produce the declaration that changed all philosophy: "I think, therefore I am." Eventually convincing himself to doubt and disregard sensory knowledge, Descartes found he could prove his existence through his thoughts. This internal information, he believed, was the true reality and external forces were hopelessly deceiving.

With Friedrich Nietzsche, philosophy was dangerous not only for philosophers but for everyone. His ideas presaged a collective madness that had horrific consequences in Europe in the early 1900s. Though his philosophy is more one of aphorisms than a system, it is brilliant, persuasive, and incisive. His major concept is the will to power, which he saw as the basic impulse for all our acts. Christianity he saw as a subtle perversion of this concept, thus Nietzsche's famous pronouncement, "God is dead."

Kierkegaard wasn't really a philosopher in the academic sense. Yet he produced what many people expect of philosophy. His subject was the individual and his or her existence, the "existing being." In Kierkegaard's view, this purely subjective entity lay beyond the reach of reason, logic, philosophical systems, theology, or even "the pretenses of psychology." Nonetheless, it was the source of all these subjects. The branch of philosophy to which Kierkegaard gave birth has come to be known as existentialism.

Karl Marx's devastating critique of capitalism, and his proposal of communism as the answer to the failings of the capitalist system, bore their greatest fruits in the twentieth century with the formation of the communist state in the Soviet Union. This great venture has now all but completely failed. Yet the force of the communist belief offered the prospect of "justice on this earth" to countless numbers. And Marx's critique has influenced generations of thinkers who call themselves Marxists.

David Hume reduced philosophy to ruins: he denied the existence of everything, except our actual perceptions themselves. I alone exist, he argued, and the world is nothing more than part of my consciousness. Yet we know that the world remains, and we go on as before. What Hume expressed was the status of our knowledge about the world, a world in which neither religion nor science is certain.

Spinoza's brilliant metaphysical system was derived neither from reality nor experience. Starting from basic assumptions, with a series of geometric proofs he built a universe which was also God, one and the same thing, the classic example of pantheism. Although his system seems an oddity today, Spinoza's conclusions are deeply in accord with modern thought, from science (the holistic ethics of today's ecologists) to politics (the idea that the state exists to protect the individual).

Long before historians added "the Great" to his name, Alexander stated, "I would rather live a short life of glory than a long one of obscurity." He certainly lived up to this ambition, conquering most of the known world in just 13 years before his death at age 33. Though undefeated in his lifetime, Alexander died unsatisfied - he always wanted more. His ambitious personality comes as no surprise considering his upbringing: born to powerful parents, he studied under Aristotle and grew up believing himself a descendant of the Greek heroes Achilles and Heracles.

Josh Kaufman founded PersonalMBA.com as an alternative to the business school boondoggle. His blog has introduced hundreds of thousands of readers to the best business books and most powerful business concepts of all time. Now, he shares the essentials of entrepreneurship, marketing, sales, negotiation, operations, productivity, systems design, and much more, in one comprehensive volume. The Personal MBA distills the most valuable business lessons into simple, memorable mental models that can be applied to real-world challenges.

Durant lucidly describes the philosophical systems of such world-famous “monarchs of the mind” as Plato, Aristotle, Francis Bacon, Spinoza, Kant, Voltaire, and Nietzsche. Along with their ideas, he offers their flesh-and-blood biographies, placing their thoughts within their own time and place and elucidating their influence on our modern intellectual heritage. This book is packed with wisdom and wit.

From two leaders in executive education at Harvard Business School, here are the mental habits and proven strategies you need to achieve outstanding results in any negotiation.

Economic forces are everywhere around you. But that doesn't mean you need to passively accept whatever outcome those forces might press upon you. Instead, with these 12 fast-moving and crystal clear lectures, you can learn how to use a small handful of basic nuts-and-bolts principles to turn those same forces to your own advantage.

Today's successful careers are not planned out in advance. They develop when people are prepared for opportunities because they have asked themselves the right questions and have rigorously assessed their unique characteristics. This article challenges listeners to take responsibility for managing their futures, both in and out of the office.

The 13 chapters of The Art of War, each devoted to one aspect of warfare, were compiled by the high-ranking Chinese military general, strategist, and philosopher Sun-Tzu. In spite of its battlefield specificity, The Art of War has found new life in the modern age, with leaders in fields as wide and far-reaching as world politics, human psychology, and corporate strategy finding valuable insight in its timeworn words.

Why have history's greatest minds - from George Washington to Frederick the Great to Ralph Waldo Emerson along with today's top performers, from Super Bowl-winning football coaches to CEOs and celebrities - embraced the wisdom of the ancient Stoics? Because they realize that the most valuable wisdom is timeless and that philosophy is for living a better life, not a classroom exercise. The Daily Stoic offers a daily devotional of Stoic insights and exercises, featuring all-new translations.

The ancient Toltecs believed that life, as we perceive it, is a dream. We each live in our own personal dream, and these come together to form the dream of the planet, or the world in which we live. Problems arise when our perception of the dream becomes clouded with negativity, drama, and judgment (of ourselves and others), because it's in these moments of suffering that we have forgotten that we are the architects of our own reality and we have the power to change our dream if we choose.

I have discovered a group of women who refuse to be exploited, are immune to manipulation, and who never settle in the name of love. These ladies know what they want and take what they want by beating men at their own game. Utilizing the secrets exposed in this book, these women gain power, money, and status. Men call them gold diggers, women call them hos, but they call themselves winners. This is the book that society doesn't want you to listen to….

Will Johnnie Veal—convicted of the murder of two police officers in 1970—be granted parole after 50 years in prison? How can he convince the parole board he’s reformed when he insists he’s innocent? What is prison time even supposed to accomplish? These are the questions that propel The Parole Room forward as it builds toward Johnnie’s 20th parole hearing—after 19 rejections.

Experience a bold take on this classic autobiography as it’s performed by Oscar-nominated Laurence Fishburne. In this searing classic autobiography, originally published in 1965, Malcolm X, the Muslim leader, firebrand, and Black empowerment activist, tells the extraordinary story of his life and the growth of the Human Rights movement. His fascinating perspective on the lies and limitations of the American dream and the inherent racism in a society that denies its non-White citizens the opportunity to dream, gives extraordinary insight into the most urgent issues of our own time.

Do you know how many wives Zeus had? Or how the famous Trojan War was caused by one beautiful lady? Or how Thor got his hammer? Give your imagination a real treat. This Mega Mythology Collection of eight audiobooks is for you....

Based on seven years of ground-breaking research and hundreds of interviews, I Thought It Was Just Me shines a long-overdue light on an important truth: Our imperfections are what connect us to each other and to our humanity. Our vulnerabilities are not weaknesses; they are powerful reminders to keep our hearts and minds open to the reality that we're all in this together.

Michael Pollan, known for his best-selling nonfiction audio, including The Omnivores Dilemma and How to Change Your Mind, conceived and wrote Caffeine: How Caffeine Created the Modern World as an Audible Original. In this controversial and exciting listen, Pollan explores caffeine’s power as the most-used drug in the world - and the only one we give to children (in soda pop) as a treat.

Navigating the challenges of long-term commitment takes effort - and it just got simpler, with this empowering, step-by-step guide to communicating about the things that matter most to you and your partner. Drawing on 40 years of research from their world-famous Love Lab, Dr. John Gottman and Dr. Julie Schwartz Gottman invite couples on eight fun, easy, and profoundly rewarding dates, each one focused on a make-or-break issue: trust, conflict, sex, money, family, adventure, spirituality, and dreams.

Aristotle wrote on everything from the shape of seashells to sterility, from speculations on the nature of the soul to meteorology, poetry, art, and even the interpretation of dreams. Apart from mathematics, he transformed every field of knowledge that he touched. Above all, Aristotle is credited with the founding of logic. When he first divided human knowledge into separate categories, he enabled our understanding of the world to develop in a systematic fashion.

Just a century after it had begun, philosophy entered its greatest age with the appearance of Socrates, who spent so much of his time talking about philosophy on the streets of Athens that he never got around to writing anything down. His method of aggressive questioning, called dialectic, was the forerunner of logic; he used it to cut through the twaddle of his adversaries and arrive at the truth. Rather than questioning the world, he believed, we would be better off questioning ourselves.

Schopenhauer, the "philosopher of pessimism", makes it very plain that he regards the world and our life in it as a bad joke. But if the world is indifferent to our fate, it doesn't thwart us on purpose. The world's facade is supported by what Schopenhauer calls the Universal Will, blind and without purpose. This Will brings on all our misery and suffering; our only hope is to liberate ourselves from its power and from the trappings of individualism and egoism that are at its mercy.

In St. Augustine in 90 Minutes, Paul Strathern offers a concise, expert account of St. Augustine's life and ideas and explains their influence on man's struggle to understand his existence in the world. The book also includes selections from St. Augustine's work, a brief list of suggested readings for those who wish to delve deeper, and chronologies that place St. Augustine within his own age and in the broader scheme of philosophy.

Spinoza's brilliant metaphysical system was derived neither from reality nor experience. Starting from basic assumptions, with a series of geometric proofs he built a universe which was also God, one and the same thing, the classic example of pantheism. Although his system seems an oddity today, Spinoza's conclusions are deeply in accord with modern thought, from science (the holistic ethics of today's ecologists) to politics (the idea that the state exists to protect the individual).

We see our age as the greatest in human history, filled with seemingly unending originality. Yet such dynamism is not a necessary characteristic of great eras. Among the most long-lasting and stable civilizations was that of medieval Europe. There stasis was achieved, and with it a stability that permitted the development of structured thought and intellectual embellishment of unparalleled degree.

With Friedrich Nietzsche, philosophy was dangerous not only for philosophers but for everyone. His ideas presaged a collective madness that had horrific consequences in Europe in the early 1900s. Though his philosophy is more one of aphorisms than a system, it is brilliant, persuasive, and incisive. His major concept is the will to power, which he saw as the basic impulse for all our acts. Christianity he saw as a subtle perversion of this concept, thus Nietzsche's famous pronouncement, "God is dead."

Confucius knew all about life and told us how to behave, but we can't find out precisely what he was up to. His well-meaning platitudes, quaint maxims, and quasi-enigmatic anecdotes combined to produce an ideal philosophy for civil servants. It would appear that his aim was to turn his pupils into good government officials, but his teachings succeeded beyond his wildest expectations, providing rules of conduct and spiritual fodder for more than two thousand years.

Immanuel Kant taught and wrote prolifically about physical geography yet never traveled further than forty miles from his home in Kvnigsberg. How appropriate it is then that in his philosophy he should deny that all knowledge was derived from experience. He insisted that all experience must conform to knowledge. According to Kant, space and time are subjective; along with various "categories," they help us to see the phenomena of the world, though never its true reality.

David Hume reduced philosophy to ruins: he denied the existence of everything, except our actual perceptions themselves. I alone exist, he argued, and the world is nothing more than part of my consciousness. Yet we know that the world remains, and we go on as before. What Hume expressed was the status of our knowledge about the world, a world in which neither religion nor science is certain.

One of the two major philosophical traditions of the twentieth century was linguistic analysis, derived largely from Wittgenstein. The other, diametrically opposed, came from Heidegger, and its fundamental question was, "What is the meaning of existence?" For Heidegger, this question could not simply be "analyzed away". It was beyond the reach of logic or reason. It was the primary "given" of every individual life. To confront it, Heidegger needed to develop an entire new form of philosophy.

During his lifetime, Jean-Paul Sartre enjoyed unprecedented popularity for a philosopher, due partly to his role as a spokesman for existentialism at the opportune moment, when this set of ideas filled the spiritual gap left amidst the ruins of World War II. Existentialism was a philosophy of action and showed the ultimate freedom of the individual. In Sartre's hands, it became a revolt against European bourgeois values.

"If we accept Wittgenstein's word for it," Paul Strathern writes, "he is the last philosopher. In his view, philosophy in the traditional sense was finished."

Karl Marx's devastating critique of capitalism, and his proposal of communism as the answer to the failings of the capitalist system, bore their greatest fruits in the twentieth century with the formation of the communist state in the Soviet Union. This great venture has now all but completely failed. Yet the force of the communist belief offered the prospect of "justice on this earth" to countless numbers. And Marx's critique has influenced generations of thinkers who call themselves Marxists.

Kierkegaard wasn't really a philosopher in the academic sense. Yet he produced what many people expect of philosophy. His subject was the individual and his or her existence, the "existing being." In Kierkegaard's view, this purely subjective entity lay beyond the reach of reason, logic, philosophical systems, theology, or even "the pretenses of psychology." Nonetheless, it was the source of all these subjects. The branch of philosophy to which Kierkegaard gave birth has come to be known as existentialism.