Western thinking about the Middle and Far East has been distorted by stereotype and inaccuracy. This argument lies at the center of Palestinian-American literary theorist Edward Said's groundbreaking book, Orientalism. Originally published in 1978, it cemented Said's reputation as the father of postcolonial studies.

Paris, 1933: Three contemporaries meet over apricot cocktails at the Bec-de-Gaz bar on the rue Montparnasse. They are the young Jean-Paul Sartre, Simone de Beauvoir, and longtime friend Raymond Aron, a fellow philosopher who raves to them about a new conceptual framework from Berlin called phenomenology. "You see," he says, "if you are a phenomenologist, you can talk about this cocktail and make philosophy out of it!"

Can the Subaltern Speak? is a classic of postcolonial studies, the discipline that examines the impact of colonial control on countries that gained their independence from European powers from the 1940s onwards. The essay, written in 1988 by Calcutta-born scholar Gayatri Chakravorty Spivak, argues that a core problem for the poorest and most marginalized in society (the subalterns) is that they have no platform to express their concerns, and no voice to affect policy debates or demand a fairer share.

Philosopher Judith Butler's 1990 work, Gender Trouble, shook the foundations of feminist theory and changed the conversation about gender. While many thinkers already accepted that "gender" was a category constructed by society rather than defined by one's genitalia, Butler went further and argued that gender is performative - it exists only in the acts that express it. Society determines that wearing makeup is "feminine" - but some men wear makeup. Are they "women"?

How do those in power exercise that power over a state's citizens? French thinker Michel Foucault's 1975 work Discipline and Punish looks to answer this question by investigating the prison system. Foucault does not believe that the modern-day system developed out of reformers' humanitarian concerns. He argues that prison both created and then became part of a bigger system of surveillance that extends throughout society.