One section of this article particularly drew my attention.
“Vaillant explains defenses as the mental equivalent of a basic biological process. When we cut ourselves, for example, our blood clots—a swift and involuntary response that maintains homeostasis. Similarly, when we encounter a challenge large or small—a mother’s death or a broken shoelace—our defenses float us through the emotional swamp. And just as clotting can save us from bleeding to death—or plug a coronary artery and lead to a heart attack—defenses can spell our redemption or ruin. Vaillant’s taxonomy ranks defenses from worst to best, in four categories.
“At the bottom of the pile are the unhealthiest, or psychotic, adaptations—like paranoia, hallucination, or megalomania—which, while they can serve to make reality tolerable for the person employing them, seem crazy to anyone else. One level up are the immature adaptations, which include acting out, passive aggression, hypochondria, projection, and fantasy. These aren’t as isolating as psychotic adaptations, but they impede intimacy. Neurotic defenses are common in ‘normal’ people. These include intellectualization (mutating the primal stuff of life into objects of formal thought); dissociation (intense, often brief, removal from one’s feelings); and repression, which, Vaillant says, can involve “seemingly inexplicable naïveté, memory lapse, or failure to acknowledge input from a selected sense organ.” The healthiest, or mature, adaptations include altruism, humor, anticipation (looking ahead and planning for future discomfort), suppression (a conscious decision to postpone attention to an impulse or conflict, to be addressed in good time), and sublimation (finding outlets for feelings, like putting aggression into sport, or lust into courtship).
So what are the best predictors (according to this study) for being happy over the age of 50? Having 5 or more of the following factors? "education, stable marriage, not smoking, not abusing alcohol, some exercise, and healthy weight”. ~50% of the men remaining in the study who met 5+ of these health factors were happy and healthy at age 80. Not a single individual with 3 or fewer of these factors was happy and healthy at age 80, regardless of physical shape in their younger years. He also found that the men's ability to deal with stress...their defense mechanisms...matured as they aged, or as the author put it "mature adaptations are a real-life alchemy, a way of turning the dross of emotional crises, pain, and deprivation into the gold of human connection, accomplishment, and creativity." In other words, there is hope for those of us who had less than wonderful childhoods.