Looking at the responses here, I see a pattern: generality in the form of downstream consequences rather than specificity of upstream causes, e.g., “world hunge

Looking at the responses here, I see a pattern: generality in the form of downstream consequences rather than specificity of upstream causes, e.g., “world hunger” rather than “lack of low-cost drought-resistant soil-regenerating edible plants” (I’m making that up — I have no idea why hunger still exists, and I’d assume it is mostly political). “Make something people want” sounds simple, but it is really hard to identify specific gaps in people’s lives that are the primary, but many-step-removed, cause of the problems in people’s lives. Maybe it is possible to go from general to specific by asking, “Why? What’s missing?” until you get to something very specific that is missing that is the root problem.