By
Mark Kumleben and Samuel Woolley
Propaganda Research Team
Center for Media Engagement
University of Texas at Austin
Maggie Engler
Global Disinformation Index Much of online speech today occurs on social media platforms like Facebook where a few companies have attained an outsized influence on what is permitted discussion on the internet. The rules and enforcement of the rules around speech on social platforms have far-reaching societal implications -- they can determine…