Jim McKelvey — American Businessman born on October 19, 1965,

Jim McKelvey is an American computer science engineer and businessperson widely known as the co-founder of Square, a mobile payments company... (wikipedia)

When I was 19 years old, I wrote my first book. I took a computer science class, and the book was garbage. I thought I could write a better one, so I did.
It's obvious that St. Louis has certain advantages compared to other cities: namely, a concentration of financial services.
I am absolutely confident that St. Louis can attract major players in technology and make the companies that are here blossom.
If you can't be persuasive to get people to believe your crazy idea, you can just go ahead and build it.
In December 1989, my mother died very suddenly, and that sparked a re-evaluation of what I was doing, and I realized I was mediocre at everything. I was a mediocre IBM employee, I was a mediocre entrepreneur, I was a mediocre artist. I decided that, although my mom wouldn't be around to see it, I wanted to be great at something.