At the root of the difference in approach is what we believe causes hunger or poverty. If you think that people are poor because there is not enough food, then you will concentrate on making measurable gains, in growing more food, and more nutritious food, more efficiently. But if you think that people are poor because of problems with equality, with access, with education, then developing a concrete strategy is far more difficult; these things are not readily measurable.

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— The Awl has put out a phenomenal #longread on the sticky problems that come with metrics-driven high-level philanthropy.