Answer: Fate and free will played major parts in creating the characters and stories in many of the Greek mythologies and tragedies. The Greeks believed that the Gods and the Oracle's could predict a person's fate before or after birth, and that no one, even the Gods could intervene in that person's fate. They also believed that a person's or God could not create their own fate. This belief stems from the three fates: sisters, The Moirai or Fates were three sister deities, incarnations of destiny and life. Because of these three old women, fate could not be avoided or altered. As such with these stories, in the Iliad fate leads Achilles down his path of glory and his early demise, and cause Oedipus to sleep with his own mother and kill his father. Free will is the power of acting without constraint and fate; acting by one's own decisions. Even though Achilleus and Oedipus have fate, they both also have free will. For instance, Achilles has a double fate: if he goes home, he will live long without glory or if he stays at Troy, he will have lots of glory, but a short life. As such, in Sophocles Oedipus the King, when Oedipus was born he was fated to kill his father and lay with his mother, thought his ability of free will caused his fate to come true.