Investing for good: possible? What do folks do?

I've saved up some amount of cash, but family is poor and hasn't had useful advice. I feel like the stock market hasn't been great for society, but surely there are some causes who would use the capital for good (and give it back when I need it later)? I have a half remembered portfolio from a previous union with a big war chest, but it doesn't feel actionable.

I'm in North America + UK; but answers globally I think are interesting.