What is Gladwell's final conclusion?

Gladwell's conclusion is that success is not individual, but rather laced with individual history, community, opportunities and legacy.

It is not easy to be so honest about where we're from. It would be simpler for my mother to portray her success as a straightforward triumph over victimhood, just as it would be simpler to look at Joe Flom and call him the greatest lawyer evereven though his individual achievements are so impossibly intertwined with his ethnicity, his generation, the particulars of the garment industry, and the peculiar biases of the downtown law firms. Bill Gates could accept the title of genius, and leave it at that. It takes no small degree of humility for him to look back on his life and say, “I was very lucky.” And he was. The Mothers' Club of Lakeside Academy bought him a computer in 1968. It is impossible for a hockey player, or Bill Joy, or Robert Oppenheimer, or any other outlier for that matter, to look down from their lofty perch and say with truthfulness, “I did this, all by myself.” Superstar lawyers and math whizzes and software entrepreneurs appear at first blush to lie outside ordinary experience. But they don't. They are products of history and community, of opportunity and legacy. Their success is not exceptional or mysterious. It is grounded in a web of advantages and inheritances, some deserved, some not, some earned, some just plain luckybut all critical to making them who they are. The outlier, in the end, is not an outlier at all.