The NATO association of Canada published a four-part series of articles briefly explaining how the study of OCEAN lead to a Cambridge researcher empowering Cambridge Analytica to specifically target voters in the Brexit and American 2016 presidential elections. I spent some time in my undergraduate program studying Psychographics, an area of research using OCEAN, a personality assessment tool measuring Openness, Conscientiousness, Extroversion, Agreeableness and Neuroticism, and back then the research showed promise. Anyway, these are a short read:

Part 1

Part 2

Part 3

Part 4

(Image taken from Article 3)