Our planet is honestly just in a sad state. I have extremely low hope for humanity. Hope that only exists because of people like Brian Greene, Michio Kaku, and Neil DeGrasse Tyson.
This.
It pretty much covers my feelings on this miserable place. Honestly, the current state of things is essentially unprecedented (world affairs), which is opposite of what the people discrediting "doomsayers" have been opining. Everybody wants to keep business as usual, with none of that "sacrifice today for a better tomorrow" happening
at all. Which is desperately needed if we are to avoid - what might be later called - a cataclysmic collapse of just about everything.
I too have little hope, provided only by the few intelligent types who have actually devoted time to thinking outside the box. Those few you mentioned are some, and various others of different career fields, can dream up great things that can help us... but the masses are ignorant and blind fools clamoring to keep things today just peachy, and many more who could give a shit about the future. Hell, governments and societies, today at least, have completely failed to plan ahead even decades - and if they do, they basically account for zero change between time markers and nothing planned can remotely accomplish the original goal.
It's going to be an ugly, miserable world... and I cannot see that happening any later than a century from now. Mark my words, I'm fairly certain we're all going to hate life entirely in less than 50 years.