ABSTRACT
This essay examines Smith’s insights into human capital as a primary driver of the wealth of nations. Adam Smith is celebrated as the founder of classical economics, yet his foundational role in articulating the principles of human capital is frequently overlooked. Writing in 1776, Smith predated the formal coining of ‘human capital’ by centuries, yet he clearly identified human skills, education, and health as analogous physical capital. Smith compared educated individuals to expensive machinery, and analyzed how specialization and training drive productivity, and showed prescient understanding of market dynamics such as supply, demand, and wage premiums. Smith further showed sophisticated views regarding the merits of public education. Although a proponent of markets, he acknowledged externalities in education and supported limited public intervention. By synthesizing Smith’s observations with modern economic frameworks, this work argues that Smith is an intellectual progenitor of human capital theory, recognizing that a nation’s prosperity depends fundamentally on the cultivation of human abilities.
Yannelis, Constantine, Adam Smith, Human Capital and the Wealth of Nations (April 1, 2026).
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