They consider three questions when deciding whether a cause has promise. First, importance — how many people’s lives would be affected and by how much? Second, could it be solved, in the short-term and long-term? And third, how crowded is the space? If a lot of smart people are already thinking about the issue, the marginal impact could be less than in other areas.
We want to think about not only the people alive today but those will be alive in the future