Dylan Matthews had a fascinating piece about a young man named Jason Trigg in The Washington Post on Sunday. Trigg is a 25-year-old computer science graduate of the Massachusetts Institute of Technology who has hit upon what he thinks is the way he can do maximum good for the world. He goes to work each day at a high-frequency trading hedge fund. But, instead of spending his ample salary, he lives the life of a graduate student and gives a large chunk of his money away.

Trigg has seized upon the statistic that a $2,500 donation can prevent one death from malaria, and he figures that, over the course of a lucrative Wall Street career, he can save many lives. He was motivated to think this way by the utilitarian philosopher Peter Singer.

From the article, Trigg seems like an earnest, morally serious man, who, if he lives out his plan, could indeed help save many lives. But if you are thinking of following his example, I would really urge caution.

First, you might start down this course seeing finance as a convenient means to realize your deepest commitment: fighting malaria. But the brain is a malleable organ. Every time you do an activity, or have a thought, you are changing a piece of yourself into something slightly different than it was before. Every hour you spend with others, you become more like the people around you.