The new plot element of Luke's parentage had drastic effects on the series. Author Michael Kaminski claims and argues in his book that it is unlikely that the plot point had ever seriously been considered or even conceived of before 1978, and that the first film was clearly operating under an alternate storyline where Vader was a separate character from Luke's father. After writing the second and third drafts in which the plot point was introduced, Lucas reviewed the new backstory he had created: Anakin had been Obi-Wan Kenobi's brilliant student and had a child named Luke, but was swayed to the dark side by Palpatine. Anakin battled Obi-Wan on the site of a volcano and was badly wounded, but was then reborn as Vader. Meanwhile, Obi-Wan hid Luke on Tatooine while the Galactic Republic became the tyrannical Galactic Empire and Vader systematically hunted down and killed the Jedi. This change in character would provide a springboard to the "tragedy of Darth Vader" storyline that underlies the prequel trilogy.