only the common feature of not finding the possibility of determinism a threat to the possibility of free will. History of free will The problem of free will has been identified in ancient Greek philosophical literature. The notion of compatibilist free will has been attributed to both Aristotle (fourth century BCE) and Epictetus (1st century CE); "it was the fact that nothing hindered us from doing or choosing something that made us have control over them". According to Susanne Bobzien, the notion of incompatibilist free will is perhaps first identified in the works of Alexander of Aphrodisias (third century CE); "what makes us have control over things is the fact that we are causally undetermined in our decision and thus can freely decide between doing/choosing or not doing/choosing them". The term "free will" (liberum arbitrium) was introduced by Christian philosophy (4th century CE). It has traditionally meant (until the Enlightenment proposed its own meanings) lack of necessity in human will, so that "the will is free" meant "the will does not have to be such as it is". This requirement was universally embraced by both incompatibilists and compatibilists. Western philosophy The underlying questions are whether we have control over our actions, and if so, what sort of control, and to what extent. These questions predate the early Greek stoics (for example, Chrysippus), and some modern philosophers lament the lack of progress over all these centuries. On one hand, humans have a strong sense of freedom, which leads them to believe that they have free will. On the other hand, an intuitive feeling of free will could be mistaken. It is difficult to reconcile the intuitive evidence that conscious decisions are causally effective with the view that the physical world can be explained entirely by physical law. The conflict between intuitively felt freedom and natural law arises when either causal closure or physical determinism (nomological determinism) is asserted. With causal closure, no physical event has a cause outside the physical domain, and with physical determinism, the future is determined entirely by preceding events (cause and effect). The puzzle of reconciling 'free will' with a deterministic universe is known as the problem of free will or sometimes referred to as the dilemma of determinism. This dilemma leads to a moral dilemma as well: the question of how to assign responsibility for actions if they are caused entirely by past events. Compatibilists maintain