http://www.nytimes.com/2011/10/30/business/luck-is-just-the-...
From Gates himself:
http://creating-luck.com/2012/01/30/bill-gates-on-pure-luck/“I was lucky in many ways: I was lucky to be born with certain skills. I was lucky to have parents that created an environment where they shared what they were working on and let me to buy as many books as I wanted to, and I was lucky with timing. The invention of the microprocessor was something profound, and it turned out that only if you were young and you were looking at that could you appreciate what that meant. And I was obsessed with writing software, and it turned out that was the key missing thing that allowed the microprocessor to have this incredible impact. So in timing, in skill set, in some of the people I was lucky enough to meet – it’s unusual to have so much luck in one’s life, but it’s been a major factor in what I’ve been able to do.”
The mismatch between his essays and his achievements is the same for many people.
Luck and being in the right place. Among other things.
http://ycombinator.com/start.html
Bill Gates was also lucky. Not that he wouldn't have been able to have a successful company without the luck.
But he wouldn't have become the richest man in the world without it.
Simply being smart as everyone knows is not enough.