Facebook has just released its quarterly earnings, beating analyst's predictions. While revenue was up, standing at $9.32 billion for Q2, the number of users now tops 2 billion. As our infographic shows, there are more monthly active users (MAU) on Facebook than there are people living in the world's most populous country. Twitter for its part can claim to have slightly more users than the United States has inhabitants. Overall, almost half of the world's population is online. Welcome to the tribe!