While early theories of economic growth emphasized capital accumulation and labor input, more contemporary analyses increasingly highlight the role of innovation and human capital development. These newer perspectives argue that sustainable long-term growth is less about merely increasing inputs and more about improving the efficiency and productivity with which those inputs are utilized, often through technological advancement and education. This shift in understanding has profound implications for policy-making, moving focus from direct investment to fostering an environment conducive to learning and creativity. The author's primary purpose in the passage is to: