Why does Adam smith believe the butcher does his job?

Adam Smith believes the butcher performs his job not out of altruism but because of self-interest. In his seminal work, "The Wealth of Nations," Smith argues that individuals pursue their own economic interests, which inadvertently benefits society as a whole. The butcher is motivated by the desire to earn a living, and in doing so, he provides meat to consumers, contributing to the overall economy. This interplay between self-interest and societal benefit is a fundamental principle of Smith's economic theory.