Greta Thunberg's activism has helped her overcome depression.

Feeling that your life is doomed and useless, and that your activities serve only to distract yourself from that, is inherently depressing. When you start to take action that has a chance to make the situation better, that naturally reduces the depression.

By contrast, her father's self-described attitude is an example of the narrow focus that puts humanity and the ecosphere in danger. Will she, some day, lead him to rise above that?