London: John Murray, 1820. First edition of this classic work regarding nature of labor, demand and profit. Octavo, original boards, retaining the original paper spine label. In very good condition. Ownership inscription from the African Society and stamp to the title page. Rare in the original boards. There can be no doubt that [Malthus’] importance for economists today rests mainly on his Principles of Political Economy. It was because of this latter work that J. M. Keynes (1933) reinstated Malthus as a major figure in modern economic thought" (New Palgrave). "In his 'Principles of Political Economy', Malthus was proposing investment in public work and private luxury as a means of increasing effective demand, and hence as a palliative to economic distress. The nation, he thought, must balance the power to produce and the will to consume" (DSB). "The Principles had only a limited impact at the time, and was severely criticized by J. R. McCulloch and Ricardo; the latter…