In nearly forty years of doing business, I know of only six senior managers or professionals between forty and fifty who struck out on their own. And two of those were lawyers. One did very well indeed with his own law firm. Two of them did fairly well. One went belly up and never recovered financially. One threw in the towel and owns a tiny bar on

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Across billion-dollar companies, the age range is quite substantial. Some founders were as young as eighteen, others as old as sixty-eight when they started their companies. The median age of a billion-dollar startup’s founder was thirty-four years old—meaning half the founders of billion-dollar startups were that age or older when they got started

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