Free will is the ability of agents to make choices unimpeded by certain prevailing factors. Such prevailing factors that have been studied in the past have included metaphysical constraints (such as logical, nomological, or theological determinism), physical constraints (such as chains or imprisonment), social constraints (such as threat of punishment or censure), and mental constraints (such as compulsions or phobias, neurological disorders, or genetic predispositions). The principle of free will has religious, legal, ethical, and scientific implications. So, do we really have free will now a days? What about in the past?