bn Sīnā (avicenna): A Very Short Introduction

Algebra marked the beginning of modern mathematics, moving it beyond arithmetic, which involves calculations featuring given numbers, to problems where some quantities are unknown. Now, it stands as a pillar of mathematics, underpinning the quantitative sciences, both social and physical.

Many people regard Hegel's work as obscure and extremely difficult, yet his importance and influence are universally acknowledged. Professor Singer eliminates any excuse for remaining ignorant of the outlines of Hegel's philosophy by providing a broad discussion of his ideas and an account of his major works.

Ideology is one of the most controversial terms in the political vocabulary, exciting both revulsion and inspiration. This book examines the reasons for those views, and explains why ideologies deserve respect as a major form of political thinking. It investigates the centrality of ideology both as a political phenomenon and as an organizing framework of political thought and action. It explores the changing understandings of ideology as a concept, and the arguments of the main ideologies. By employing the latest insights from a range of disciplines, the reader is introduced to the vitality and force of a crucial resource at the disposal of societies, through which sense and purpose is assigned to the political world.

Identity has become one of the most widely used terms today, appearing in many different contexts. Anything and everything has an identity, and identity crises have become almost equally pervasive. Yet "identity" is extremely versatile, meaning different things to different people and in different scientific disciplines. To many its meaning seems self-evident, since its various uses share common features, so often the term is used without a definition of what, exactly, is meant by it. This provokes the core question: What exactly is identity?

Environmental ethics is a relatively new branch of philosophy, which studies the values and principles involved in combatting environmental problems such as pollution, loss of species and habitats, and climate change. As our environment faces evermore threats from human activities these core issues are becoming increasingly important.

Stoicism is two things: a long past philosophical school of ancient Greece and Rome, and an enduring philosophical movement that still inspires people in the twenty-first century to re-think and re-organize their lives in order to achieve personal satisfaction. What is the connection between them?

What is Literary Theory? What is the relationship between literature and culture? In fact, what is Literature, and does it matter? These are the sorts of questions addressed by Jonathan Culler in a book which steers a clear path through a subject often perceived to be impenetrable. It offers insights into theories about the nature of language and meaning, whether literature is a form of self-expression or a method of appeal to an audience, and outlines the ideas behind a number of different schools: deconstruction, semiotics, postcolonial theory, and structuralism amongst them.

Freemasonry is one of the oldest and most widespread voluntary organizations in the world. Over the course of three centuries men (and women) have organized themselves socially and voluntarily under its name. With a strong sense of liberation, moral enlightenment, cosmopolitan openness and forward-looking philanthropy, freemasonry has attracted some of the sharpest minds in history and has created a strong platform for nascent civil societies across the globe. With the secrecy of internally communicated knowledge, the clandestine character of organization, and the enactment of rituals and the elaborate use of symbols, freemasonry has also opened up feelings of distrust, as well as allegations of secretiveness and conspiracy.

Gravity is one of the four fundamental interactions that exist in nature. It also has the distinction of being the oldest, weakest, and most difficult force to quantize. Understanding gravity is not only essential for understanding the motion of objects on Earth, but also the motion of all celestial objects, and even the expansion of the Universe itself. It was the study of gravity that led Einstein to his profound realisations about the nature of space and time.

Is one person's terrorist another's freedom fighter? Is terrorism crime or war? Can there be a "War on Terror"?