Final answer:
Adam Smith wrote 'The Wealth of Nations' which influenced neoclassical economics with concepts like the division of labor and the 'invisible hand' that advocates for a minimal governmental role in the economy.
Step-by-step explanation:
The book that Adam Smith wrote, which relates to neoclassical economics, is titled An Inquiry into the Nature and Causes of the Wealth of Nations, commonly referred to as The Wealth of Nations. Published in 1776, this seminal work laid the foundations for classical economics and greatly influenced neoclassical economic thought. In his book, Smith introduced concepts such as the division of labor, the role of self-interest in a free market, and the mechanism he called 'the invisible hand', which describes the self-regulating behavior of the marketplace. He also advocated for a laissez-faire economic policy, where the government's involvement in the economy is minimal. Smith’s insights remain foundational to economic theory and practice, and his perspectives continue to inform discussions on capitalism, market dynamics, and government economic policy.