Digital media, and particularly social media, could potentially play a role in encouraging social polarization. This is because social media sites like Facebook can help cluster friends and acquaintances into homophilous circles, and social news sites like Digg can facilitate a consumption of news that is biased by its user’s choices. In the extreme, a lack of “a common public sphere” could lead to isolated, polarized groups which could even be hostile towards one another. For example, during the Arab Spring uprisings, it was observed that social media furthered the social stratification already present in several Arab states.