I think that ultimately everything is attributable to luck, good or bad. Not just the obvious things, like IQ, genes that predipose to health or sickliness, the historical era and the country in which one is born, the wealth of one’s parents, whom one happens to meet at critical stages of one’s life and career, one’s height and looks and temperament, to the extent genetic, and one’s innate propensity to risk or caution (that is an exceptionally important factor); but also the characteristics that cause a person to make critical decisions that may turn out well or badly, characteristics that really are derivative from some of the previously noted “luck” characteristics. The decision-determining characteristics include intelligence, imagination, attitude toward risk, and personality characteristics such as aggressiveness, maladjustment, indolence, and having a low or high personal discount rate (how future-regarding one is or is not). Talent is luck but so is the propensity for working hard (often the consequence of a compulsive personality) or not working hard.
In talking to older people who’ve had good lives, inevitably half of them will say, “The most significant thing in my life is that I’ve been extraordinarily lucky.” And when you hear that you know you’re hearing the truth. It doesn’t diminish their talent or industry. You can have all that and fail.