He added, "People who go to church are more likely to volunteer and give to charity — not just because they're religious, but because they're part of a community."

Zuckerberg thinks Facebook can help, using its networking power to organize people.

"A church doesn't just come together. It has a pastor who cares for the well-being of their congregation, makes sure they have food and shelter. A little league team has a coach who motivates the kids and helps them hit better. Leaders set the culture, inspire us, give us a safety net, and look out for us." ...