What are we doing wrong now, which the general public isn't aware of currently?
Industrial animal farming. Deforestation and greenhouse gases from it are destroying the planet when you don't need meat to be healthy.
https://en.wikipedia.org/wiki/Environmental_impact_of_meat_p...
> "The livestock sector is also the primary driver of deforestation in the Amazon, with around 80% of all converted land being used to rear cattle.[37][38] 91% of land deforested since 1970 has been converted to cattle ranching.[39][40]"
https://en.wikipedia.org/wiki/Environmental_impact_of_meat_p...
> At a global scale, the FAO has recently estimated that livestock (including poultry) accounts for about 14.5 percent of anthropogenic greenhouse gas emissions estimated as 100-year CO2 equivalents.[57] A previous widely cited FAO report using somewhat more comprehensive analysis had estimated 18 percent.[8]
That's not even getting into the cruelty of slaughtering 70 billion a year (vegetarians are not exempt from this - farm animals are slaughtered when they can't produce any more milk or eggs). Most western countries would be appalled at eating dogs and cats but because it's cultural to eat cows, pigs and chickens for example, the cruelty of slaughtering them is normalised, ignored and casually joked about.
At the moment, it seems that the vast majority of people carve out a special ethical exception for the military but I suspect this will change over time. Many futurist/sci-fi dystopian scenarios have the general shape of the Terminator movies with autonomous killing machines roaming the planet. If these proliferate, perhaps the terror of that reality will bring into focus the immorality of using force to achieve geopolitical goals. And it feels like we're getting uncomfortably close to that future.
https://twitter.com/DocBunker/status/1270390796978536450
https://www.ausa.org/publications/mission-command-and-armed-...
For a preview, look at the black community where over 7/10 kids are born to single moms (for comparison, this number was below 3/10 in 1965).
You know a funny story about this, is that bloodletting (phlebotomy) is the standard medical treatment for iron overload and hemochromatosis. A hereditary condition that affects as many as 1% of Northern Europeans.
Even for those without hereditary hemochromatosis, there's evidence of pernicious health impact from iron levels even on the high-end of normal.[1] Regular blood donors have much lower incidence rates of disease as varied from Alzheimers to colon cancer. This is especially true for those who are carriers of the hemochromatosis mutation, which is as much as 10% of Northern Europeans.
[1] http://nautil.us/issue/67/reboot/iron-is-the-new-cholesterol
https://www.artofmanliness.com/articles/the-potential-benefi...
this might depend on the country, with some being better, or a lot better than others
for example, in school, my teachers taught me useless trivia about Historical figures (some of which I later learned could be fictitious), I was also "taught" how to use sandpaper on an ornamental piece of wood (instead of learning how to use the tools to cut wood to make something useful, like a chair or a table)
wasting time on those useless things, instead of first aid, handling money (basic financial information, like savings accounts, how interests can work for you, or agains you, loans, etc.), laws (as in, what's legal, and illegal, and why), knowledge that should be universal, like the declaration of human rights
I also think shielding children from "bad language", and the knowledge of sex, and death does them a disservice, but I don't have an alternative that could be at least seen as reasonable
also, religion, at least the way it's "introduced" on chilren (forced on them, really)
With health, I think the gut will play a significant role and also psychology. So many symptoms people develop have their roots in psychological problems.
I think driving is one thing humans will clearly not be doing in 100 years and it will be considered incredible that we put up with the human toll (injuries & deaths) that it caused.
Imagine if there were 'stores' that had all the basic product needs for free.
There would be no point for anyone to have extra and the open market value would be 0.
The current citizenship system makes no sense, economically or morally. Why should the place of your birth or the citizenship of your parents should mandate which countries you are allowed to visit and in which markets you are allowed to participate?
If the trajectory of liberalism continuous its march (a consistent trend for hundreds of years, but not a certain one), then the citizenship system that we as a world have crafted will be either replaced by a more sensical one or entirely scratched (i.e. open borders). I hope that this happens within my lifetime.