US federal prison population

Between 2015 and 2023, Facebook's monthly active users grew while the US federal prison population declined, producing an inverse correlation of -0.9633. The libertarian reading is that social media has replaced incarceration as America's preferred method of confining people in small spaces where they scroll endlessly and feel bad. The more measured reading is that Facebook's global growth and the federal prison system's contraction are driven by entirely independent forces—one technological, one policy-driven—that happened to move in opposite directions during the same nine-year window. The inmates were not released because of Facebook. But the Facebook users may sometimes feel imprisoned.

Facebook grew from roughly 1.5 billion to nearly 3 billion MAUs between 2015 and 2023, driven by developing-market adoption. The federal prison population declined from about 205,000 to under 160,000 due to sentencing reform, compassionate release, and policy changes. Both are nine-year trends driven by separate institutional dynamics on different axes of American and global life.

A globally growing technology platform and a domestically shrinking prison system will produce an inverse correlation across any shared window. The r-value measures opposite directions, not a relationship between social media and incarceration policy.