... the Cosmological Argument was in the writings of Plato, and the argument is also largely grounded in the metaphysics of Aristotle. Both Plato and Aristotle argued that the fact of motion (i.e. things move) requires a mover '... the series must start with something for nothing can come from nothing' (Aristotle) The key idea is that if something exists there must be preliminary factors that have influenced (and caused) it to exist. However it was Aquinas who was the most well known exponent of the argument which was expressed in three of his 'Five Ways'. They were: 1. motion or change 2. cause 3. contingency In the First Way, based on motion, Aquinas argued what ever moves is dependant on something else for its motion. The chain of movement cannot go back to infinity and so there must be a first 'unmoved mover'. This 'unmoved mover' is God. In the Second Way, based on causes, ...

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