An up-and-coming visionary in the world of philanthropy and a cofounder of the effective altruism movement explains why most of our ideas about how to make a difference are wrong and presents a counterintuitive way for each of us to do the most good possible.   While a researcher at Oxford, William MacAskill decided to devote his study to a simple question: How can we do good better? MacAskill realized that, while most of us want to make a difference, we often decide how to d