There are many people who think that way too, but I think fred_durst seems to genuinely be more concerned about the effects on society. When I was considering

There are many people who think that way too, but I think fred_durst seems to genuinely be more concerned about the effects on society. When I was considering careers, I concluded that there are 3 world-changing scientific problems: aging, neuroscience (understanding the brain and cognitive enhancement), and AI. Interestingly, they're all intertwined. Best of luck. Personally I think AI will come before a cure for aging. In some ways, I view my work as a fallback, in case AI doesn't come fast enough. The societal stakes for AI are also much higher.