Written in Greek by an intellectual Roman emperor without any intention of publication, the Meditations of Marcus Aurelius offer a wide range of fascinating spiritual reflections and exercises developed as the leader struggled to understand himself and make sense of the universe. Spanning from doubt and despair to conviction and exaltation, they cover such diverse topics as the question of virtue, human rationality, the nature of the gods and the values of leadership.

The Prince is a 16th-century political treatise by the Italian diplomat and political theorist Niccolò Machiavelli. Machiavelli wrote The Prince in 1513, after he was forced to leave Florence as a political exile. Dedicated to Lorenzo de’ Medici, the work is Machiavelli’s advice to the ruler of Florence on how to stay in power.

Perhaps the most important work of philosophy after the Allegory of the Cave. Incomparable logic and findings about the things that matter in life with a clear, succinct prose touch.

The most thorough statement of one of Emerson's recurrent themes, the need for each individual to avoid conformity and false consistency, and follow his or her own instincts and ideas. It is the source of one of Emerson's most famous quotations, "A foolish consistency is the hobgoblin of little minds." This essay is a considered a watershed moment in which transcendentalism became a major cultural movement. An American classic.

The Communist Manifesto, originally the Manifesto of the Communist Party (German: Manifest der Kommunistischen Partei), is an 1848 political document by German philosophers Karl Marx and Friedrich Engels. Commissioned by the Communist League and originally published in London just as the Revolutions of 1848 began to erupt, the Manifesto was later recognised as one of the world's most influential political documents.

The Art of War, literally The Laws of War by Master Sun is the most famous ancient Chinese treatise, dedicated to a military strategy and policy, written by Sun Tzu. The treatise by Sun Tzu influenced crucially on a whole military art of the East. Although it is the first treatise on the military art, it includes clearly expressed common principles of strategy as well as tactics. A special place in a military theoretical literature belongs to comments on Sun Tzu, the earliest of which appeared in the Han era (206-220 AD), and the new ones are still being created.

The foundation for all modern economic thought and political economy, The Wealth of Nations is the magnum opus of Scottish economist Adam Smith, who introduces the world to the very idea of economics and capitalism in the modern sense of the words.

A century after it first appeared, Crime and Punishment remains one of the most gripping psychological thrillers. A poverty-stricken young man, seeing his family making sacrifices for him, is faced with an opportunity to solve his financial problems with one simple but horrifying act: the murder of a pawnbroker. She is, he feels, just a parasite on society. But does the end justify the means? Rodion Romanovitch Raskolnikov makes his decision and then has to live with it.

In these four dialogues, Plato develops the Socratic belief in responsibility for one's self and shows Socrates living and dying under his philosophy. In Euthyphro, Socrates debates goodness outside the courthouse, Apology sees him in court, rebutting all charges of impiety, in Crito, he refuses an entreaty to escape from prison, and in Phaedo, Socrates faces his impending death with calmness and skillful discussion of immortality.

 The Iliad and The Odyssey are epic poems traditionally attributed to Homer, of which the written versions are dated to the 8th century BCE. Chronicling events in the Greek Bronze Age, this magnificent pair of poems forms the cornerstone of Western literature. If The Iliad is a classic war story, The Odyssey is symbolic of the individual’s journey through life.