Bill Gates. George W. Bush. Osama bin Laden. Leaders and leadership are perennial topics of debate. What is leadership? How does one become a leader? Do we actually need leaders? In this Very Short Introduction, Keith Grint offers provocative answers to these questions, prompting readers to rethink their assumptions about what leadership is. Indeed, Grint argues that leadership is a very elusive quality, and that there are few definitive answers to be found, which explains why most books on leadership produce so much heat and so little light. But there are important questions to ask, questions which shed light on why leadership so resists definition. Grint looks at the way leadership has evolved from its earliest manifestations in ancient societies, highlights the early ideas about leadership found in Plato, Sun Tzu, Machiavelli and others, considers how social, economic, and political forces can undermine particular modes of leadership, and discusses the practice of management, its history, future, and influence on all aspects of society.

    Using examples from Byzantinearchitecture, art and literature, Sarris shows how their legacy was re-worked and re-invented in the centuries ahead, in the face of external challenges and threats. Charting the impact of warfare with the Persian and Islamic worlds to the east, Sarris explores the creativity of Byzantine statecraftand strategy, as well as the empire's repeated (but ultimately forlorn) attempts to enlist aid from the Christian powers of Western Europe to ensure its survival.ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to makeinteresting and challenging topics highly readable.

    In this lively and compact introduction, astrophysicist Andrew King reveals how the laws of physics force stars to evolve, driving them through successive stages of maturity before their inevitable and sometimes spectacular deaths, to end as remnants such as black holes. The book shows how we know what stars are made of, how gravity forces stars like the Sun to shine by transmuting hydrogen into helium in their centers, and why this stage is so long-lived and stable. Eventually the star ends its life in one of just three ways, and much of its enriched chemical content is blasted into space in its death throes. Every dead star is far smaller and denser than when it began, and we see how astronomers can detect these stellar corpses as pulsars and black holes and other exotic objects. King also shows how astronomers now use stars to measure properties of the Universe, such as its expansion. Finally, the book asks how it is that stars form in the first place, and how they re-form out of the debris left by stars already dead. These birth events must also be what made planets, not only in our solar system, but around a large fraction of all stars.

    It explains what algorithms do, how they are used, the risks associated with using them, and why governments should be concerned. Important areas arehighlighted, such as Stream Ciphers, block ciphers, public key algorithms, digital signatures, and applications such as e-commerce. This book highlights the explosive impact of cryptography on modern society, with, for example, the evolution of the internet and the introduction of more sophisticatedbanking methods.

    Nearly every regime today claims to be democratic, but not all democracies allow free politics, and free politics existed long before democratic franchises. This book is a short account of the history of the doctrine and practice of democracy, from ancient Greece and Rome through the American, French, and Russian revolutions, and of the usages and practices associated with it in the modern world. It argues that democracy is a necessary but not asufficient condition for good government, and that ideas of the rule of law, and of human rights, should in some situations limit democratic claims.

    Newspaper column inches have been devoted to murderers with psychopathic features, and we also encounter psychopaths in films and books. Individuals with psychopathy are characterised in particular by lack of empathy and guilt, manipulation of other people and, in the case of criminal psychopathy, premeditated violent behaviour. They are dangerous and can incur immeasurable emotional, psychological, physical, and financial costs to their victims and their families.Despite the public fascination with psychopathy, there is often a very limited understanding of the condition, and several myths about psychopathy abound. For example, people commonly assume that all psychopaths are sadistic serial killers or that all violent and antisocial individuals are psychopaths. Yet, research shows that most psychopaths are not serial killers, and, equally, there are plenty of antisocial and violent offenders who are not psychopaths. This Very Short Introduction gives an overview of how we can identify individuals with or at risk of developing psychopathy, and how they differ from other people who display antisocial behavior. Essi Viding also explores the latest genetic, neuroscience, and psychology evidence in order to illuminate why psychopaths behave and develop the way they do, and considers whether it is possible to prevent or even treat psychopathy.ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

    Readers meet a people highly skilled in sculpture, astronomy, city planning, poetry, and philosophy, who were also profoundly committed tocosmic regeneration through the thrust of the ceremonial knife and through warfare. Dav�d Carrasco looks beyond Spanish accounts that have colored much of the Western narrative to let Aztec voices speak about their origin stories, the cosmic significance of their capital city, their methods of childrearing, and the contributions women made to daily life and the empire. Carrasco discusses the arrival of the Spaniards, contrasts Aztec mythical traditions about the origins of their city with actual urban life in Mesoamerica, and outlines the rise of the Aztec empire. He also explores Aztecreligion, which provided both justification for and alternatives to warfare, sacrifice, and imperialism, and he sheds light on Aztec poetry, philosophy, painting, and especially monumental sculpture and architecture. He concludes by looking at how the Aztecs have been portrayed in Western thought, art, film, and literature as well as in Latino culture and arts.

    It contains more than 99% of the world's living space, produces half of its oxygen, plays a critical role in regulating its climate, and supports a remarkably diverse and exquisitely adapted array of life forms, from microscopic viruses, bacteria, and plankton to the largest existing animals. In this unique Very Short Introduction, biologist Philip Mladenov provides a comprehensive overview of marine biology, offering a tour of marine life and marine processes that ranges from the polar oceans to tropical coral reefs, and from shoreline mollusks to deep-sea hydrothermal vents. Mladenov also looks at a number of factors that pose a significant threat to the marine environment and to many of its life forms-threats such as overfishing, coastal development, plastic pollution, oil spills, nutrient pollution, the spread of exotic species, and the emission of climate changing greenhouse gases. Throughout the book he successfully weaves around the principles of marine biology a discussion of the human impacts on the oceans and the threats these pose to our welfare. About the Series: Oxford's Very Short Introductions series offers concise and original introductions to a wide range of subjects--from Islam to Sociology, Politics to Classics, Literary Theory to History, and Archaeology to the Bible. Not simply a textbook of definitions, each volume in this series provides trenchant and provocative--yet always balanced and complete--discussions of the central issues in a given discipline or field. Every Very Short Introduction gives a readable evolution of the subject in question, demonstrating how the subject has developed and how it has influenced society. Eventually, the series will encompass every major academic discipline, offering all students an accessible and abundant reference library. Whatever the area of study that one deems important or appealing, whatever the topic that fascinates the general reader, the Very Short Introductions series has a handy and affordable guide that will likely prove indispensable.

    In this Very Short Introduction, Michael Wood offers a wealth of insight into the nature of film, considering its role and impact on society as well as its future in the digital age. As Wood notes, film is many things, but it has become above all a means of telling stories through images and sounds. The stories are often quite false, frankly and beautifully fantastic, and they are sometimes insistently said to be true. Indeed, many condemn movies as an instrument of illusion, an emphatic way of seeing what is not there. And others celebrate the reverse: that film brings us closest to the world as it actually is. "Photography is truth," a character says in a film by Jean-Luc Godard. "And cinema is the truth twenty-four times per second." But they are stories in either case, and there are very few films, Wood observes, even in avant-garde art, that don't imply or quietly slip into narrative.

    During his reign he conquered the Achaemenid Persian Empire, the largest empire that had ever existed, leading his army from Greece to Pakistan, and from the Libyan desert to the steppes of Central Asia. His meteoric career, as leader of an alliance of Greek cities, Pharaoh of Egypt, and King of Persia, had a profound effect on the world he moved through. Even in his lifetime his achievements became legendary and in the centuries that following his story was told and retold throughout Europe and the East. Greek became the language of power in the Eastern Mediterranean and much of the Near East, as powerful Macedonian dynasts carved up Alexander's empire into kingdoms of their own, underlaying the flourishing Hellenistic civilization that emerged after his death.But what do we really know about Alexander? In this Very Short Introduction, Hugh Bowden goes behind the usual historical accounts of Alexander's life and career. Instead, he focuses on the evidence from Alexander's own time -- letters from officials in Afghanistan, Babylonian diaries, records from Egyptian temples -- to try and understand how Alexander appeared to those who encountered him. In doing so he also demonstrates the profound influence the legends of his life have had on our historical understanding and the controversy they continue to generate worldwide.ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

    But away from shock tactics in the gallery, there are many unanswered questions. Who is really running the art world? What effect has America's growing political and cultural dominance had on art?Here Julian Stallabrass takes us inside the international art world to answer these and other controversial questions, and to argue that behind contemporary art's variety and apparent unpredictability lies a grim uniformity. Its mysteries are all too easily explained, its depths much shallower thanthey seem. Contemporary art seeks to bamboozle its viewers while being the willing slave of business and government. This book is your antidote and will change the way you see contemporary art.About the Series: Combining authority with wit, accessibility, and style, Very Short Introductions offer an introduction to some of life's most interesting topics. Written by experts for the newcomer, they demonstrate the finest contemporary thinking about the central problems and issues in hundredsof key topics, from philosophy to Freud, quantum theory to Islam.

    Their archaeological record is both substantial and fascinating, including tomb paintings, sculpture, jewelry, and art. In this Very Short Introduction, Christopher Smith explores Etruscan history, culture, language, and customs. Examining the controversial debates about their origins, he explores how they once lived, placing them within the geographical, economic, and political context of the time. Smith concludes by demonstrating how the Etruscans have been studied and perceived throughout the ages, and the impact this has had on our understanding of their place in history.About the Series: Oxford's Very Short Introductions series offers concise and original introductions to a wide range of subjects--from Islam to Sociology, Politics to Classics, Literary Theory to History, and Archaeology to the Bible. Not simply a textbook of definitions, each volume in this series provides trenchant and provocative--yet always balanced and complete--discussions of the central issues in a given discipline or field. Every Very Short Introduction gives a readable evolution of the subject in question, demonstrating how the subject has developed and how it has influenced society. Eventually, the series will encompass every major academic discipline, offering all students an accessible and abundant reference library. Whatever the area of study that one deems important or appealing, whatever the topic that fascinates the general reader, the Very Short Introductions series has a handy and affordable guide that will likely prove indispensable.

    Historical records are first found in Babylon and Egypt, and after two millennia the arithmetical astronomy of the Babylonians merged with the Greek geometrical approach to culminate in the Almagest of Ptolemy. This legacy was transmitted to the Latin West via Islam, and led to Copernicus's claim that the Earth is in motion. In justifying this Kepler converted astronomy into a branch of dynamics, leading to Newton's universal law of gravity. The book concludes with eighteenth- and nineteenth-century applications of Newton's law, and the first explorations of the universe of stars.

    From the movement of flocks of birds to the Internet, environmental sustainability, and market regulation, the study and understanding of complex non-linear systems has become highly influential over the last 30 years.In this Very Short Introduction, one of the leading figures in the field, John Holland, introduces the key elements and conceptual framework of complexity. From complex physical systems such as fluid flow and the difficulties of predicting weather, to complex adaptive systems such as the highly diverse and interdependent ecosystems of rainforests, he combines simple, well-known examples -- Adam Smith's pin factory, Darwin's comet orchid, and Simon's 'watchmaker' -- with an account of the approaches, involving agents and urn models, taken by complexity theory.ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

    He examines the ethical responsibility of the journalist to respond to the demands of civil society, as opposed to the demands of the state, and focuses on contentious issues in contemporary journalism, such as intrusion, lack of accountability, obscenity, trivialization, rumor-mongering, and libel.