Ender's Game and What Happens When the Family is Broken

Summary:
Ender's Game is a sci-fi novel by Orson Scott Card. It follows a young boy who is taken from his family to receive training as a military commander. He eventually has a breakdown after he realizes that he has been tricked into wiping out an alien species by his superiors.

New Things Learned:
Though Ender's family unit is only shown intact for a short period in the novel, it is clear that he relies upon them greatly for emotional support. Once he is taken away, he manages to find some friends who function as a makeshift family. It isn't until the next stage of his training that he is without their direct support, which leads to increasingly cold and ruthless behavior. This book makes a convincing case for the importance of child rearing in a family setting. Although he is mentally capable and very talented, Ender still relies on his friends and sister to keep his emotional state level. As has been shown in tests with baby rhesus monkeys, a lack of emotional attachments creates some pretty severe psychological problems.

Question:
While reading this book, I wondered about the realism in the book's ending. He eventually finds the last remaining alien and tries to find a place for it to live with his sister. Card essentially throws away Ender's psychological problems once he is reunited with his sister. I would like to know more about the long-term effects of children being raised away from a family unit.