Effective Altruism is a movement & community of people focusing on the effectiveness -
> about answering one simple question: how can we use our resources to help others the most?
https://www.effectivealtruism.org/
Giving What We Can is a community of people who have pledged to give at least 10% of their income to cost-effective charities. I'm a proud member of 10 years.
https://www.givingwhatwecan.org/
Zell Kravinsky gave nearly-all of his $45 million he made from real-estate
https://en.wikipedia.org/wiki/Zell_Kravinsky and a talk he gave https://www.youtube.com/watch?v=RvUcbcUMtXw