One way to improve a person’s capacity to do good is to increase the accuracy of their beliefs. Since people’s actions are determined by their desires and their beliefs, a person aiming to do good will generally do more good the more accurate their beliefs are.
Examples of belief-improving work include reading books, crafting arguments in moral philosophy, writing articles about important problems, and making scientific discoveries.
Two distinctions are relevant in this context. First, a person can build capacity by improving either their factual or their normative beliefs. Second, a person can build capacity by improving either particular beliefs or general processes of belief-formation.