Good point. Future historians looking back will likely consider 2015/2016 to be the point when we entered the social-media-epoch. Both Brexit and Trump where mainly social-media-driven phenomenon.
"Barack Obama’s successful campaign for the presidency has been widely attributed to the use of social networking sites, mobile devices, and interactive websites to engage previously hard-to-reach populations in political activity. Campaign communication strategies may be applicable for youth health promotion efforts, particularly for the highly stigmatized issue of mental health. In this article, we examine elements of the 2008 Obama presidential campaign’s use of social media technologies and content designed to foster effective political participation among youth."