Consider a mathematician, who has just got his PhD (in some field, say, algebraic/arithmetic geometry).
How can he change the world for the better? I'm talking about how to use skills (soft skills or hard skills) he obtained by reaching his doctorate degree (frustration tolerance, problem solving ability, conceptual thinking and so on) to reach for higher goals as
- working against the climate change
- working against how the (economic) world works, which is doing bad to most of the people on planet earth (making some people rich and most people suffer a life in poorness to make this possible)
- having a direct positive impact on the (world) society.
Further, he should be able to live from the considered activity. Maybe this is just a too broad question, but I would love to hear great ideas how he could use his expertise to have (direct, concrete) positive impact on the world.
I'm aware of the opinion that if he continues being an active researcher, that this is indeed some kind of positive impact on society. But I would like to know about even more direct or more immense impact.
Thank you for your ideas!