Your time and energy is far more valuable than your money.

I would recommend using that money as an emergency fund, and getting involved with an activist organization working to stop climate change. There are a wide range of them, with tactics ranging from legislative pressure to property destruction and civil disobedience. Believe it or not, there are lots of small local problems that a small group can meaningfully impact, and will add up.

While there are systemic problems that cannot be solved by an individual, they can be solved by collective organization. You have to be part of that collective if you want to stop climate change.

Because there’s another mass shooting every couple days. It’s hard to care about why one dude did something crazy 7 years ago while bullets are still flying. People are much more focused on trying to stop the next one.

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There are some good answers here, but I would also note that because the legal system is adversarial, continued investment can go a long way towards a desired outcome. If you can afford a parade of experts, huge amounts of gathered evidence, and contingency plans researched and prepared by dozens of lawyers and paralegals, you’ll do better in court.

It’s an arms race, so the “best” lawyers have spent the most on arms. That also means that even the worst lawyers have to invest a lot to keep up.