Trivia: There is a little reference to the novel One Hundred Years of Solitude by Gabriel Garcia Marquez. Ben, the robot, upon meeting Jimmy says something like "Solitude is great, but 100 years of it..."
Trivia: RLS in the name RLS Legacy in which the crew set off, stands for Robert Louis Stevenson, author of Treasure Island.
Answer: The father abandoned the family because he apparently did not want the responsibility of providing for them. It's an old story of wayward irresponsible men leaving their wife and children for their own selfish reasons. Whether or not it would have figured in a sequel is unknown.
raywest ★