Fallen Son: The Death of Captain America five issues, each based on Elizabeth Kubler Ross' Five Stages of Grief: denial, anger, bargaining, depression, and acceptance. Loeb lobbied hard to write the series, and succeeded, saying that he could draw upon his own experience of having lost his son Sam Loeb. In the Spring Preview issue of "Wizard" magazine, Loeb said: Wolverine confronts The Winter Soldier about the improbability of Captain America dying from the gunshot wounds suffered at the court house; especially since both Captain America and Winter Soldier, the former Bucky, have both been thought to be dead at one time yet survived. Unable to get
Kübler-Ross model Yale University obtained some findings consistent with the five-stage hypothesis but others inconsistent with it. Several letters were also published in the same journal criticizing this research and arguing against the stage idea. George Bonanno, Professor of Clinical Psychology at Columbia University, in his book "The Other Side of Sadness: What the New Science of Bereavement Tells Us About Life After a Loss", summarizes peer-reviewed research based on thousands of subjects over two decades and concludes that a natural psychological resilience is a principal component of grief and that there are no stages of grief to pass. Bonanno's work has