Monism

Webster's Dictionary

(1): (n.) See Monogenesis, 1.

(2): (n.) That doctrine which refers all phenomena to a single ultimate constituent or agent; - the opposite of dualism.

(3): (n.) The doctrine that the universe is an organized unitary being or total self-inclusive structure.

The Nuttall Encyclopedia

The name given to the principle of any system of philosophy which resolves the manifold of the universe into the evolution of some unity in opposition to Dualism ( q. v .).