Anticipatory grief
The five stages namely, denial, anger, bargaining, depression, and acceptance proposed by Elisabeth Kübler-Ross in her model of grief describe the process by which people undergo after a loss. Anxiety, dread, guilt, helplessness, hopelessness, and feelings of being overwhelmed are also common. However, it is important to note that anticipatory grief is not simply normal grief begun earlier.
George Bonanno
That people are resilient even when facing extreme stressors or losses contradicts the stages model of grief. Many resilient people show no grief. They therefore have no stages of grief to pass through. Until Bonanno, therapists and psychiatrists considered the absence of grief a pathology to be feared, rather than a healthy outcome.