Earlier quoted context omitted.
Well, ancients managed to find damn good heuristics without all our knowledge and science. And we entire have a country proud of their universities, you know, ivy league branding and stuff, and they can't even take over the baton, just reprinting old books. [I mean the mental firmware to not get broken. When it is really broken, I feel often it might be hard to climb out without a dedicated help of a _psychiatrist_.]
I believe research related to mental health is lagging. While ancient therapies may have been effective in the past, we're now living in a completely different age, and coping strategies and treatments need to advance accordingly. It can be very challenging to fix things when they are truly broken. That's why starting with mental well-being is crucial for taking control of it and building resilience. Don't wait until…
The new things of 21th century might me discipline of dealing with unnatural abundance of pleasure/information/change/people, but simple countermeasures already pop into my head without too much thinking, like abstaining from read news or social media.
Or learning to ignore the cultural values spread by random people around. Homo sapiens are known for unconscious masochism by accepting harmful values and proudly battling them :-) I moved to Southern Europe, and I find it funny that people here are more joyful and content despite they earn less $$$ than citizens of depressed hardworking superpowers. Of course, they may have their own problems, but even on the subconscious level their facial expressions or postures perceived as noticeably relaxed.