Why won't you believe Mark Zuckerberg that he's not running for president?

Mark Zuckerberg is not running for president. He's got a higher calling.

The Facebook CEO reiterated again on Sunday night that he is not looking to pursue public office. His recent cross-country tour had roused speculations that Zuckerberg was working to broaden his public image beyond that of the boy genius or, perhaps worse, the Jesse Eisenberg version portrayed in "The Social Network."

Monday's post, however, wasn't just about that.

Zuckerberg provided a deeper reason for his trip, in which he's visiting all 50 states. He has previously said the trip was to get him out of his bubble. Doing so, he wrote in Sunday's Facebook post, has opened his eyes to the importance of friends — which is a little convenient coming from the CEO of Facebook.

"My biggest takeaway so far is that our relationships shape us more than we think – how we consider opportunities, how we process information, and how we form habits," Zuckerberg wrote in the post, which is embedded below. "There is a lot of discussion about inequality, but one under-looked dimension of inequality is in the makeup of our social networks."

One major point Zuckerberg hammered home is that information isn't the only part of decision-making. Our environment, including our friends and family, are crucial to how we live, he noted.

"There's a widely held myth that if people in other places just had better information they'd make better decisions. I've found this is generally wrong and the people I've met are rational," he wrote. "Now, it's true we're all missing some information that would help us make better decisions no matter where we live. But the people I've met have good reasons for the decisions they make based on their experiences and those of their friends and family."

This is, again, something of a convenient thing to have learned. Facebook has been under fire recently for the spread of fake news, propaganda, and other forms of misinformation across its network. Facebook, which had previously denied there was any problem, has more recently undertaken a variety of programs to educate users and promote high-quality publishers.

Zuckerberg related a few stories to illustrate his point, including young people sent to juvenile centers and former heroin addicts. These examples are persuasive, and Zuckerberg's writing here feels reasonably authentic (he has a whole team that tends to help with these things). He used these examples to suggest where Facebook might be going.

"Facebook has been focused on helping you connect with people you already know. We've built AI systems to recommend "People You May Know". But it might be just as important to also connect you with people you should know -- mentors and people outside your circle who care about you and can provide a new source of support and inspiration," Zuckerberg wrote.

He pointed to the Peace Corps as one example ("Perhaps we could build a new digital peace corps.") as well as Alcoholics Anonymous and Narcotics Anonymous as models that have provided people with important connections to better their lives.

"This is something I've only recently started studying and working with our teams at Facebook to build," he wrote.