Core dual ideas of early development, economics and practice, were that (a) national development was a four-fold transformation of countries towards: (i) a more productive economy, (ii) a more responsive state, (iii) more capable administration, and (iv) a shared identity and equal treatment of citizens and that (b) this four-fold transformation of national development would lead to higher levels of human wellbeing. The second is strikingly correct: development delivers. National development is empirically necessary for high wellbeing (no country with low levels of national development has high human wellbeing) and also empirically sufficient (no country with high national development has low levels of human wellbeing). Three measures of national development: productive economy, capable administration, and responsive state, explain (essentially) all of the observed variation in an omnibus indicator of wellbeing based on over 58 distinct indicators, the Social Progress Index. How national development delivers on wellbeing varies, in three ways. One, economic growth is much more important for achieving wellbeing at low versus high levels of income. Two, economic growth matters more for “basic needs” than for other dimensions of wellbeing (like social inclusiveness or environmental quality). Three, state capability matters more for wellbeing outcomes that depend on public production than on private goods (and for some wellbeing indicators, like physical safety, for which growth doesn’t matter at all). While these findings may seem too common sense to be worth a paper, national development--and particularly economic growth—is, strangely, under severe challenge as an important and legitimate objective of action within the development industry.

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