Is 'Not Depressed' the Same as Happy?

When we hear "mental health," most of us think about not being sick — not being depressed, not having anxiety, not struggling with a disorder. But this paper argues that mental health is really two different things, not one. The first is the absence of mental illness.

A person with no diagnosed illness can still feel empty, just as someone with depression can still find life meaningful.

The second is positive mental well-being — things like happiness, a sense of meaning, good coping, and feeling that life is going well. These two are related, but they are not the same. The authors bring together different kinds of evidence to make their case. Conceptually, knowing someone doesn't have a mental illness doesn't tell us whether they're happy or feel their life has purpose.

Empirically, studies show that some people with depression still report high levels of life satisfaction, and some people with no diagnosis feel stuck or unfulfilled. Data from the Global Flourishing Study, which spans 22 countries, shows that different factors relate to each dimension differently. For example, religious service attendance was much more strongly connected to life satisfaction than to depression, while age was more strongly connected to depression than to life satisfaction. The paper also reviews evidence that positive mental well-being may help prevent future mental illness. People who scored high on well-being measures had a 69–90% lower risk of developing a mental disorder later, even after accounting for their starting point.

The authors argue that we need to measure, study, and promote positive mental well-being alongside our efforts to treat mental illness — not as a replacement, but as a necessary companion.