In “The National Gain,” Anders Chydenius presents a pioneering exploration of economic theory and public policy during the Age of Enlightenment. This seminal work merges philosophical discourse with practical economic reasoning, advocating for free trade, individual liberty, and common welfare. Crafted with eloquence and intellectual rigor, Chydenius's writing reflects a clarity of thought that has influenced economic thought, showcasing an early formulation of ideas that would later underpin modern capitalism. Set against the backdrop of 18th-century Sweden, the text challenges the prevailing mercantilist ideologies and argues convincingly for policies that benefit the societal whole. Chydenius, a priest, politician, and reformer, was deeply influenced by Enlightenment ideals, leading him to question the socio-economic structures of his time. His multifaceted background equipped him with both religious conviction and a progressive outlook, driving his commitment to social justice and economic reform. His role as a member of the Swedish Parliament enabled him to champion his ideas, making “The National Gain” not only a reflection of his thoughts but also a call to action for his contemporaries. This essential text is a must-read for scholars and enthusiasts of economic philosophy and history. Its forward-thinking premise invites readers to reconsider the connection between personal freedom and collective well-being, making it highly relevant for contemporary discussions on public policy and economic strategy.