This document is a student's compare and contrast essay on the science fiction films Aliens (1986) and Avatar (2009), both directed by James Cameron. The essay outlines four key similarities between the films: 1) They are both set on alien planets, 2) They both deal with themes of overcoming life's challenges, 3) The main characters in both films demonstrate bravery and righteousness, 4) Both stories end with humans returning to Earth. The essay concludes that while these films were influenced by their shared genre and director, they also contain certain universal plot structures that enable different stories to be told using similar narrative elements.