Bill Gates, Oprah Winfrey and Mark Zuckerberg have this trait. So did the late Steve Jobs.

There are reports that Warren Buffett might, too (although this photograph suggests otherwise) along with at least eight of the 18 presidents in the last 100 years, plus Leonardo da Vinci, Michaelangelo, Richard Branson, and two out of the four Beatles.

Today is  International Left Handers Day, and to celebrate, we're looking at the surprising degree to which left-handed and ambidextrous people seem to be overrepresented in the ranks of high-achievers--especially high-achievers for whom intelligence and creativity played a role in their success.

Among them, of course, the 28 people listed above, who fall into the 10 percent of lefties and ambidextrous people.

Theories abound, both about why a small minority of people have a dominant left hand, and whether there might be an identifiable connection the ways their brains tackle other challenges.

A 2013 study at the University of Athens found that lefties performed better on two types of cognitive tests, and there are both physiological theories (left-handed people have a slightly larger "bundle of fibers" connecting the brain's hemispheres) and practical (left-handers spend their lives adapting to a world designed for righties.)

There was a theory that suggested lefties likely were twins while in utero, but that their twin hadn't survived; this theory has been called into question. As the left-handed Gates put it (while explaining why be bought a notebook that had been used by the left-handed da Vinci): "There's a little bit higher variance of talent, high or low, for left-handers that's never been explained."

But what is truly fascinating is the range of high-achieving sets in which the preponderance of lefties far outpaces their overall representation in human society.

Of the five wealthiest people in the world, two are left-handed (not counting Buffett; I see him mentioned without sources as being left-handed in lots of stories, but haven't seen find confirmation). So, 40 percent at least, versus 10 percent overall.

And of the presidents: eight out of 18 works out to over 44 percent. We cut this off at 100 years because prior to that for obvious reasons there's no film footage of the presidents signing bills, and thus no way to know for sure.

We also include Ronald Reagan and Harry Truman alongside Presidents Wilson, Hoover, Ford, Bush I, Clinton, and Obama in this list, since both Reagan and Truman were reportedly naturally left-handed, but were forced as children to learn to write with their right hands.

In fact, the preponderance of high-achieving left-handers is probably even higher than reported, due to the fact that until deep into the 20th Century, left-handedness carried a stigma that led ill-informed, well-meaning teachers and parents to try to force lefties to become righties.

I guess they weren't baseball fans (roughly 25 percent of MLB players are also lefties).

Anyway, enjoy your day, lefties. And when you ultimately take over the world, please treat the rest of us kindly.