A teleological argument, or argument from design, is an argument for the existence of God or a creator based on perceived evidence of order, purpose, design, or direction — or some combination of these — in nature. The word "teleological" is derived from the Greek word telos, meaning "end" or "purpose". Teleology is the supposition that there is purpose or directive principle in the works and processes of nature. Immanuel Kant called this argument the Physico–theological proof.