On the Fourfold Root of the Principle of Sufficient Reason (1813) - His dissertation, a commentary on the principle of sufficient reason (the premise that everything must have a cause or reason).
On Vision and Colours (1816) - A psychological examination arguing the subjectivity of vision.
The World as Will and Representation (1818) - An exploration into the will to life, quelling the suffering of the world, and the particular way humans perceive the world.
On the Will in Nature (1836) - an expansion of the will to life as appearing in the natural processes of the world.
On the Basis of Morality (1840) - Schopenhauer's own ethical theory that compassion is the primary foundation of morality.
The Metaphysics of Love (1844) - An argument that romantic love is driven by the will to life and thus cannot lead to happiness for the individual.
Parerga and Paralipomena (1851) - A collection of supplementary essays including Schopenhauer's commentary on the education, wisdoms of life, dialectics, and more.
Essays - Including The Art of Controversy, The Art of Being Right, The Wisdom of Life, The Vanity of Existence, among others.
