Instagram: Kevin Systrom & Mike Krieger (2017)

Zumba began as a mistake: aerobics teacher Beto Perez brought the wrong music to class, then improvised a dance routine to go with it. For his students, it was more fun than work — and it eventually grew into one of the biggest fitness brands in the world. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

2 Jan 201737min

In 2008, it was nearly impossible to buy a fashionable, affordable pair of glasses online. That simple frustration inspired the idea behind Warby Parker – and disrupted the eyewear industry. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

26 Dec 201630min

Melissa and Doug Bernstein's first success was a wooden 'fuzzy puzzle' of farm animals. Today, Melissa & Doug makes over 2,000 kinds of toys and serves as an antidote to the rise of digital toys. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

19 Dec 201636min

In 1973, Yvon Chouinard started Patagonia to make climbing gear he couldn't find elsewhere. Over decades of growth, he has implemented a unique philosophy about business, leadership and profit. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

12 Dec 201625min

Mark Cuban made millions off of tech startups, then billions off of stocks — and later went on to buy and revive the Dallas Mavericks. He has come to define the persona of the serial entrepreneur. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

5 Dec 201633min

In 1996, Angie Hicks spent hours reading contractor reviews to members over the phone. Today, the online review and referral service, Angie's List, is publicly traded on the New York Stock Exchange. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

28 Nov 201629min

In 1968, competitors sued to keep Herb Kelleher's new airline grounded. After a 3-year court fight, the first plane took off from Dallas. Today Southwest Airlines operates nearly 4,000 flights a day. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

21 Nov 201633min

As a kid, José Andrés tended fires for his father's backyard paella cookouts. Later, he trained with the best Spanish chefs, and began building a restaurant empire that would transform the way many Americans dine out. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

14 Nov 201627min