It seems that British political consultancy firm Cambridge Analytica illegally gained access to over 50m Facebook user profiles to mine these for personal information that enabled them to create very personalized political messages. This form of data-driven and target-specific political communication has been critiqued widely.
The recent polarization of public opinion on major societal issues has seen a rise in dogmatic thinking and failure of discourse. The psychology of cult behaviour can give valuable insight into why people are drawn to ideologies and what can be done to open the public debate.
Why different values matter when people make political arguments