Sources on Cambridge Analytica:
Spotify - The RedLine Podcast - Part19 (The part about the Cambridge Analytica starts at 24:14 - Cambridge Analytica whistleblower Brittany Kaiser talks to Red Line Podcast)
Spotify - Today, Explained - Cambridge Analytica
One of the best explanations of Cambridge Analytica
Some related information
Emotional Contagion - Experimental evidence of massive-scale emotional contagion through social networks
