The first thing that comes to mind is that "changing the world" is not usually a good goal.

This book

https://www.amazon.com/Looking-Out-Where-Want-Life/dp/162636...

has a pretty good explanation of why that's so, and I was recently reading this book

https://www.amazon.com/dp/1890109533

which makes the same case for people who are interested in polyamory. In that case you've got to navigate something pretty complicated just to make the world better for some group of maybe 3..10 people and even though it's in the context of "broken institutions" you really have to attend to your immediate environment.