"He opposed Locke's views and propounded concept of 'monad'. Monads are dynamic, continuously active and developing according to their own laws. They are not influenced by external (environmental) effect and are independent therefore no causes.
A monad is like a perfect watch. Two such watches agree but have no cause-effect relationship. Cause is illusory. Harmony in nature because harmony in the laws of monads. Mind and body are example of monads. The monads are inner determinant of
behavior. Man is generator of ideas."