Free will can be described as free only if there is the possibility of it to be enslaved. If nature has created free will with the objective of it being free, then free will is not actually free because it is determined by nature to be free. Liberty means absence of external restraint; it does not mean that free will is uncaused. In a causally determined universe, free will can be caused by internal factors but this means that it is causally determined. However, if our choices are uncaused, then our actions will be unpredictable and that will imply that the impulses of free will are impossible to morally evaluate.