WGN's Marcus Leshock is celebrating the 10th anniversary of Facebook. (Posted on: February 4, 2014)

Facebook co-founder and CEO Mark Zuckerberg took to his social network early Tuesday to look back on how his company came to be so successful.

Zuckerberg, who launched the company when he was just a 19-year-old student at Harvard, said he never imagined that Facebook would be what it is now. There was a need to connect the world through one service, he said, and he and his company cared deeply about doing that.

"When I reflect on the last 10 years, one question I ask myself is: Why were we the ones to build this? We were just students. We had way fewer resources than big companies. If they had focused on this problem, they could have done it," Zuckerberg wrote in a Facebook post. "The only answer I can think of is: We just cared more."

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But as proud of he is of Facebook so far, Zuckerberg said he is more excited about the next 10 years. Currently, social networks are about sharing moments. He said the future will be about using these connections to solve the world's major problems.

Zuckerberg said it is also the company's responsibility to help give Internet access to the two-thirds of the world's people who remain unconnected.

"It's rare to be able to touch so many people's lives, and I try to remind myself to make the most of every day and have the biggest impact I can," he said. 

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