Boils down to choice.
As a species we have had the technology to uplift humanity in many varied ways for decades, from the most undeveloped countries to the most developed.
We have the science and the means to do so many times over and yet we dont.
Its not that we cannot , its that we choose not to.
I'm slowly starting to come to the conclusion that there is no 'cure'. Give people food, they will continue to overpopulate and demand more food - for example.
We also cannot function without currency and by nature we cannot escape the Pareto distribution of wealth as we will always move in that direction.
Also by accepting no delusions of "equal capability" and/or the human effort required to empower all others - We must accept that not all men can offer equal value to the economy and there will always be groups/people who suffer.
And for society to function as it does we require all classes of people. From street sweepers to successful entrepreneurs. From low wage farming communities to bustling cities.
It just seems like helping undeveloped countries is essentially a rabbit hole.
The only true escape from all this I've found is the Venus Project or Resource Based Economy which at least has potential to solve the whole climate thing as well - but even that has its problems and seems like a pipe dream. My other thought is that there is just too many darn people in this world - even if we are technically not overpopulated by resources we are indeed overpopulated by complexity.
But we still need to continue breeding to keep the taxpayer numbers up. More industry, more production, more expansion, more needs etc...
I just don't see a way at all. Nothing

It's a bad and frustrating picture in my mind.