International Studies

James E. Lovelock says the Earth (Gaia) is a superorganism, made up of all living things, interacting with the air, the oceans, and the surface rocks of the planet. He suggests Gaia takes an active role in keeping the planet safe for life, with automatic feedback mechanisms making adjustments as needed. Lovelock describes feedback mechanisms that are widely accepted. It is the implication that Gaia is somehow self-aware that is controversial.

In her 1958 article "Modern Moral Philosophy", British philosopher Elizabeth (G. E. M.) Anscombe does nothing less than challenge the very foundations of moral philosophy, the discipline that tries to understand right and wrong action. The article sets out three main ideas. First, that moral philosophy should not be explored until a philosophy of psychology is already in place. Second, that philosophers who do not believe in God should not use ideas about "obligation" and "duty".

First available in 1689, John Locke's Two Treatises of Government is considered one of the most important works ever written on the foundations of government. Published anonymously, it argues against the popular idea at the time that monarchs have a God-given right to rule. Instead Locke proposes that sovereignty - supreme authority - ultimately resides with the people.

How many books can claim to be so influential as to inspire the development of a whole school of thought? The ancient Greek philosopher Aristotle's Metaphysics did exactly that, laying the foundations for a new branch of philosophy - metaphysics - concerned with the cause and nature of being.

One of the most influential books on economics ever written, Thomas Robert Malthus's An Essay on the Principle of Population remains one of the most controversial too. This 1798 work inspired naturalists Charles Darwin and Alfred Russel Wallace to develop the theory of natural selection. But it has also sparked criticism - Karl Marx famously called Malthus a "lackey of the bourgeoisie." Yet this hasn't stopped leading present-day environmentalists from taking up Malthus's ideas.

Published in 1980, Michael E. Porter's Competitive Strategy went against the accepted wisdom of the time that said firms should focus on expanding their market share. Porter claimed they should, in fact, analyze the five forces that mold the environment in which they compete: new entrants, substitute products, buyers, suppliers, and industry rivals. Then they could rationally choose one of three "generic strategies" - lowering cost, differentiating their product, or catering to a niche market.

Published in 1996, Arjun Appadurai's Modernity at Large is an edited collection of earlier essays that had already made the Indian-born anthropologist an influential figure in his field of cultural anthropology. Appadurai here presents a theory of globalization, and suggests ways that other researchers can follow up on his ideas. Many of them continue to do so. For anthropologists, the book offered new ways of thinking about how communities are affected by globalization.

US psychologist Abraham Maslow's 1943 essay "A Theory of Human Motivation" established his idea of humanistic psychology as a "third force" in the field. He outlined a new approach to understanding the mind, saying humans are motivated by their need to satisfy a series of hierarchical needs, starting with the most essential first. He thought it important for the advancement of psychology to identify, group, and rank them in terms of priority.

In his 1936 book The General Theory of Employment, Interest and Money, Keynes argued that traditional economics has misunderstood the causes of unemployment. Employment is not determined by the price of labor; it is directly linked to demand in the economy. Keynes believed market economies are by nature unstable and so require government intervention. Spurred on by the social catastrophe of the Great Depression of the 1930s, Keynes set out to change the way the world thinks about economics.

David Hume's book tackling the subject of belief in God is among the most influential in Western philosophy. Published in 1779, three years after Hume's death, without featuring the author's name, the book was deeply controversial in its day. It is now considered a masterpiece and Hume is regarded as one of the greatest philosophers writing in English.

Under the title "Civil Disobedience", American author Henry David Thoreau's essay was originally published in 1866, four years after his death in 1862. It is based on a lecture, "Resistance to Civil Government", that Thoreau gave many years earlier, in 1848. "Civil Disobedience" asked when an individual should actively oppose a government and its justice system. Thoreau's answer was that opposition was legitimate whenever government actions or institutions were unacceptable to an individual's conscience.

Our Common Future is a joint work produced in 1987 by a United Nations commission headed by former Norwegian Prime Minister, Gro Brundtland. Intended to respond to a growing number of environmental concerns faced by the global community, it recognized the need for long-term strategies to manage natural resources. It says we must act collaboratively to protect the environment, while at the same time stimulating economic and social development.

How do we know what knowledge is? In his 1963 article, "Is Justified True Belief Knowledge?", American philosopher Edmund Gettier radically challenged the accepted definition of knowledge itself. Greek philosopher Plato, discussing knowledge well over 2,000 years ago, defined it as "justified true belief". But in two ingenious cases, Gettier demonstrates that somebody's justified belief can be true because of nothing more than luck.

An extraordinarily ambitious work, Republic has made important contributions to many branches of modern philosophy. The work unfolds as a series of conversations in which participants set out a number of different theories of justice, and then imagine how these theories might become reality within the political structure of a city. In examining justice, Plato investigates an enormous range of questions in the areas of ethics, politics, and even the nature of existence itself.

Among the general public, Descartes is probably most famous for his pronouncement "I think, therefore I am." That statement first appeared in an earlier work, but he expands on it in Meditations as he considers the idea of the mind as a separate entity to the body - the "dualist" approach. Descartes also set out to dispel skepticism - the idea that one cannot truly know anything. Using his "methodological skepticism," he showed that by doubting everything, we can know some things beyond doubt.

First published in Germany in 1980, British historian Ian Kershaw's The "Hitler Myth" is recognized as one of the most important books ever written about Adolf Hitler and the Nazi State. Kershaw wanted to focus on what he called the "history of everyday life", and so investigated the attitude of the German public to Hitler at the time, rather than looking at the dictator from the perspective of those in positions of power. He was intrigued to find out how someone like Hitler could have become such a powerful figure.

In her original and controversial 2005 book Politics of Piety: The Islamic Revival and the Feminist Subject Saba Mahmood examines the women's mosque movement in Cairo, Egypt as part of a wider turn to religious fervor integral to the broader Islamic revival of the twenty-first century. Mahmood's research suggests that in choosing to embrace the norms of their faith, these pious Muslim women are not limiting, but rather affirming, themselves.

Richard Dawkins' 1976 investigation into the science of evolution has become an enormous success, selling over a million copies in 25 languages. Drawing on the work of renowned evolutionary scientists, Dawkins makes his argument about evolution by focusing on the gene itself. While others considered evolution to occur at the level of the individual or the group, here Dawkins sees the process of natural selection differently.

Albert Hourani's 1991 work, A History of the Arab Peoples, is unsurpassed as an overview of Arab history, from the rise of Islam to the late 20th century. Going far beyond the political history that had generally characterized previous examinations, Hourani integrates a wide range of scholarship to provide a deep analysis of social, cultural, and economic structures. His interest in the everyday lives of Arab people and his desire to understand what united - rather than divided - many different nationalities gives listeners a new and vital perspective on the region.

A work that had a huge influence on great thinkers including celebrated German philosopher Immanuel Kant, An Enquiry is Hume's examination of how we obtain information and form beliefs. He argues that we mainly gain knowledge through our senses, a theory known as empiricism. But while the impressions from our senses are key to our beliefs about the world, Hume argues that reason and facts play only a limited part.