Some links to a few articles you might find interesting...

Darwin, Charles - On The Origin Of Species

Descartes, Rene - Meditations On First Philosophy

Homer - The Iliad

Homer - The Odyssey

Kant, Immanuel - "What is Enlightenment?"

Marx, Karl - The Communist Manifesto

Paine, Thomas - Common Sense

Plato - Collected Works

Poe, Edgar Allan - Collected Works

Shakespeare, William - Collected Works

Voltaire - Candide