Language defines us as a species, placing humans head and shoulders above even the most proficient animal communicators. But it also beguiles us with its endless mysteries, allowing us to ponder why different languages emerged, why there isn't simply a single language, how languages change over time and whether that's good or bad, and how languages die out and become extinct.

"Correlation does not imply causation". This mantra has been invoked by scientists for decades and has led to a virtual prohibition on causal talk. But today, that taboo is dead. The causal revolution, sparked by Judea Pearl and his colleagues, has cut through a century of confusion and placed causality - the study of cause and effect - on a firm scientific basis.

Grammar! For many of us, the word triggers memories of finger-wagging schoolteachers, and of wrestling with the ambiguous and complicated rules of using formal language. But what is grammar? In fact, it's the integral basis of how we speak and write. As such, a refined awareness of grammar opens a world of possibilities for both your pleasure in the English language and your skill in using it, in both speech and the written word.

In a business world that spans several continents, it is no longer common for everyone to speak English as a first language. Whether you speak English as a first, second, or even third language, intercultural business communication means that getting it right first time has never been more important for you and your organization. English can never be standardized in the global and digital marketplace; instead, we can learn how to customize business English according to our own values and culture and communicate successfully across borders.

Over the past few years, Brianna Wiest has gained renown for her deeply moving, philosophical writing. This new compilation of her published work features pieces on why you should pursue purpose over passion, embrace negative thinking, see the wisdom in daily routine, and become aware of the cognitive biases that are creating the way you see your life. Some of these pieces have never been seen; others have been read by millions of people around the world. Regardless, each will leave you thinking: This idea changed my life.

Start speaking English in minutes, and grasp the language, culture and customs in just minutes more with Ultimate Getting Started with English Box Set, a completely new way to learn English with ease! Ultimate Getting Started with English Box Set will have you speaking with proper pronunciation from the very first lesson and arm you with cultural insight and other information to utterly shock and amaze your American friends.

Get a time-travelling tour of world history with these 30 brilliant lectures that cover the full story of human civilization, analyzing geography, technology, economies, social institutions, and cultural achievements. Every lecture is delivered in special period characters often invented to illustrate the life of their times. Professor Thompson speaks and acts like them. He actually becomes them! He's such an entertaining presenter that you’ll learn without knowing it.

Mesopotamia is the ancient name for the region that is now Iraq, a remarkably advanced civilization that flourished for two-thirds of the time that civilization has existed on Earth. Mesopotamians mastered irrigation agriculture; built the first complex urban societies; developed writing, literature, and law; and united vast regions through warfare and diplomacy. While civilizations like Greece and Rome have an unbroken tradition of written histories, the rich history of Mesopotamia has only been recently rediscovered, thanks to the decipherment of Mesopotamia's cuneiform writing less than 200 years ago.

In The Great Tours: Experiencing Medieval Europe, award-winning Professor Kenneth R. Bartlett of the University of Toronto invites you to travel through time to the golden ages of 12 of Europe’s most beautiful medieval cities. In 24 lectures, you’ll discover teeming markets and mercantile centers, royal feasts and ritual, dramatic military engagements, magnificent religious pageantry, and the many colorful layers of daily medieval life.

Look beyond the abstract dates and figures, kings and queens, and battles and wars that make up so many historical accounts. Over the course of 48 richly detailed lectures, Professor Garland covers the breadth and depth of human history from the perspective of the so-called ordinary people, from its earliest beginnings through the Middle Ages.

"It doesn't take an Einstein to understand modern physics," says Professor Wolfson at the outset of these 24 lectures on what may be the most important subjects in the universe: relativity and quantum physics. Both have reputations for complexity. But the basic ideas behind them are, in fact, simple and comprehensible by anyone. These dynamic and illuminating lectures begin with a brief overview of theories of physical reality starting with Aristotle and culminating in Newtonian or "classical" physics.

Whether complete or only fragmentary, the 930 extant Dead Sea Scrolls irrevocably altered how we look at and understand the foundations of faith and religious practice. Now you can get a comprehensive introduction to this unique series of archaeological documents, and to scholars' evolving understanding of their authorship and significance, with these 24 lectures. Learn what the scrolls are, what they contain, and how the insights they offered into religious and ancient history came into focus.

The Maya forged one of the greatest societies in the history of the ancient Americas and in all of human history. Long before contact with Europeans, Maya communities built spectacular cities with large, well-fed large populations. They mastered the visual arts, and developed a sophisticated writing system that recorded extraordinary knowledge in calendrics, mathematics, and astronomy. The Maya achieved all this without area-wide centralized control.

What is our species' greatest invention? Medicine, computers, space travel? Not even close. The innovation that underlies each of our past achievements and those we still aspire to is language. Language is the ultimate invention of Homo sapiens - one that has allowed us to change the physical and social world around us in every conceivable way, and an invention that has fundamentally changed us, as well.

We struggle to manage complexity every day. We follow intricate diets to lose weight, juggle multiple remotes to operate our home entertainment systems, face proliferating data at the office, and hack through thickets of regulation at tax time. But complexity isn't destiny. Sull and Eisenhardt argue there's a better way: by developing a few simple yet effective rules, you can tackle even the most complex problems.