I thought this was going to be an article about optimism ("geeking out" as in getting excited about things). I acknowledge that I'm responding to the headline and not the meat of the article. I've recently (past ~5 years) stopped viewing the world pessimistically. I don't believe it's because I'm blindly optimistic, but because I didn't have the perspective to understand our ancestor's problems and how good of a life…
Our impact on the environment is measurable and the impacts look dire. Income disparity seems to be increasing locally and globally. The military industrial complex of the largest nation-states feels eternal, as if it is a fundamental part of neoliberal capitalism.
I can "half-full" almost everything day to day. Financial issues, medical issues, family problems... never easy, but doable. I can handle it, smile on my face, and tough it out. But when I'm left alone with my thoughts, its hard for me not to draw the conclusion that the world my children (or their children) grow up in will be worse-off, and they will live harder lives than we have.