I think what I'd like to do is something in the climate change resilience arena... help communities prepare for extreme weather events.
This sounds good, and would likely suit you :)
It is obviously (for some at least) going to have a lot more need in the not too distant future. Most people are avoiding even talking about it.
What I do think would happen given the "no need" scenario, is that I would likely change what I do over time naturally. Probably start where I am and since I could be more risk-taking, gravitate into something more impactful. Not sure what that would be for me, but the last few months I have been thinking about building a local community of sort, where people are able to get help to be their best at something they really want to pursue through reference groups and mentoring from the group. There are so many unhealthy communities online, it would be good to be part of a healthy one in the real world.
The idea of a real mentoring community sounds amazing. You could potentially find experts to speak to the group about various different fields... financial, legal, woodworking, etc.
This is the idea. A community of people who both learn skills, and can share skills and experience.