Tara Thiagarajan is founder and chief scientist of Sapien Labs, a nonprofit organization that runs the Mental Health Million Project and its annual Mental State of the World Report, which uses an online survey to track mental wellbeing among internet-enabled populations around the world.

The 2021 report, just published, was the project's second annual effort. Authored by Thiagarajan and lead scientist Jennifer Newson, it surveyed more than 233,000 internet users in 34 countries. The overall objective, write the authors, is to "provide an evolving global map of mental wellbeing and enable deep insights into its drivers."

Its results have considerable implications regarding mental health and the factors that contribute to it.