Mercantilism is an economic theory and practice that emerged in Europe during the 16th to 18th centuries. It emphasizes the importance of accumulating wealth, primarily gold and silver, through a positive balance of trade, where exports exceed imports. Mercantilist policies often involved government intervention in the economy, such as tariffs, subsidies, and trade monopolies, to enhance national power and economic self-sufficiency. Ultimately, mercantilism laid the groundwork for modern economic theories and the development of capitalism.