I came for the vegan comment however as it was already there, the biggest change I could see from mass adoption of the vegan ideals are that the population would have an across the world increase in empathy to not only animals but because they aren't murdered as part of societal norms the empathy towards and the treatment of humans is likely to increase as well. This could theoretically lead to an increase in environmental action helping climate change but also help addressed a number of socialogical issues at the same time. We are a long way from this however in the uk veganism has increased 1567% in 10 years so with this rate of change it is possible.

A slow burn. Humanity is slowly wiping itself out. If this is a Q humanity test then we have failed. We need a Picard/Riker/Data/LaForge combo

I probably whine the most about the lack of transit options in my city.

Proposed solution: Take intra-city transportation out of the control of the county, so it is run by the city instead. The county can run the buses from the suburbs, or not. We can extend the streetcar, increase bus frequency, all the stuff the city wants, that keeps getting slapped down by the county commissioners, because the suburbs don't want buses.

Spend more public money on it and hire some more intelligent people to help.

There's a lot of "billionaires shouldn't exist" and "eat the rich" sentiment out there. I often suggest jokingly that it should be legal to murder someone once they reach a certain level of wealth. It might motivate them to limit their greed at some point, perhaps be less exploitative of those who are working to generate their wealth or share more of it. And even if they pass the threshold, they may give more concern to how they treat people and how they are perceived.

You can't actually solve them. Depends on which problems of course, but most of them have to do with our societies not being fair whatsoever.

If bringing food to people is so hard, why not bring people to the food? 🤷🏻‍♂️