Social Media:

Cal Newport:

"the more you use social media to interact with your network, the less time you devote to offline communication."

"The key issue is that using social media tends to take people away from the real-world socializing that's massively more valuable."

"the heaviest social media users [are] much more likely to be lonely and miserable. The small boosts you receive from posting on a friend's wall or liking their latest Instagram photo can't come close to compensating for the large loss experienced by no longer spending real-world time with the same friend."

"many of these tools are engineered to hijack our social instincts to  create an addictive allure."