3.3 Surveillance, Manipulation & Democracy

The same data infrastructure that serves you personalised shopping recommendations can also be used to personalise political reality — shaping what you believe, how you vote, and whether you participate in democracy at all.

Cambridge Analytica and micro-targeting

In 2018, it emerged that Cambridge Analytica had harvested the Facebook profile data of up to 87 million people without meaningful consent, by exploiting a loophole in Facebook's app API. The firm used this data to build psychological profiles of American voters — categorising them by personality traits (using the OCEAN model) — and deliver hyper-targeted political messages designed to appeal to each type. The firm claimed to have worked on the Brexit referendum and the 2016 US presidential campaign. The episode exposed the power of combining detailed personal data with psychographic modelling and targeted delivery.

Filter bubbles and polarisation

Social media algorithms are optimised for engagement. Content that provokes strong emotional reactions — outrage, fear, moral indignation — generates more clicks, shares, and time spent. The data collected about your reactions is used to show you more of what keeps you engaged. Over time, users in the same society can inhabit radically different information environments — what researcher Eli Pariser (2011) called the 'filter bubble.' Evidence of the polarising effect of algorithmic feeds is contested but growing; studies by NYU's Center for Social Media and Politics and others find associations between algorithmic curation and political polarisation.

State surveillance of activists and journalists

The power of surveillance technology is not limited to corporations. Authoritarian governments use commercial spyware — including NSO Group's Pegasus — to monitor journalists, lawyers, and human rights activists. Amnesty International's 2021 Pegasus Project investigation documented the targeting of over 50,000 phone numbers in 50 countries. Even in democracies, evidence of domestic surveillance of civil rights activists, Muslim communities, and political dissidents has emerged repeatedly — including through Snowden's 2013 NSA disclosures.

Commercial manipulation versus authoritarian use

The difference is a matter of degree and accountability. Commercial manipulation (political micro-targeting) operates within a market logic: it aims to change consumer or voter behaviour for profit or electoral gain. Authoritarian surveillance targets dissenters for persecution — imprisonment, torture, or death. Both use the same underlying data infrastructure. The distinction matters for policy; both matter for democratic health.

For a deeper look at how information is weaponised to change minds, see the companion course Media Literacy.

Your takeaway

The data economy is not politically neutral. Personal data collected for commercial purposes can be repurposed for political manipulation. And surveillance infrastructure built for security can be turned against the people it claims to protect.