This synthetic commentary offers a handful of observations. First, it highlights structural differences between the advanced market/capitalist economy that forms the theoretical scaffolding of Keynesian theory, as against the diverse range of structural and institutional configurations that characterise contemporary developing economies. Second, bearing these distinctions in mind, how far does the notion of “full employment” hold relevance in the context of developing economies? Third, the focus shifts to the central Keynesian policy prescription: reflating economic activity through injecting additional demand into the system, in extremis through pump-priming, digging and filling trenches – would this perform in a poor agrarian economy? Would the multiplier work and deliver in the realities of developing economies? Fourth, the central policy agenda in the South was that of launching industrialisation, leading to a sustained structural transformation of the economy – a la the Kaldorian industrialisation paradigm, which is scarcely visible in the (post-)Keynesianism template. Fifth, it queries the investment function and the role of state investment, and/or of “animal spirits” of capitalist entrepreneurs and agents, whether of domestic or foreign origins. Sixth, there is need to widen the focus, as well argued by Hans Singer, Amiya Bagchi and others, from Keynes-I of The General Theory, to Keynes-II of Bretton Woods, thereby substantially widening the interface with the agenda of development. Finally, there is the inevitable question concerning the nature and role of the state in the contrasting developed-vs-developing-economy, then-and-now scenarios. This discursive commentary is largely a Cambridge dialogue, not inappropriate in a tribute to Geoff Harcourt.