The influential philosopher known for the concept of utilitarianism is Jeremy Bentham. Active in the late 18th and early 19th centuries, Bentham founded the school of thought that promotes the idea that the best action is the one that maximizes utility, defined as that which produces the greatest happiness for the greatest number of people. His works, such as "An Introduction to the Principles of Morals and Legislation," laid the groundwork for utilitarian ethics. Bentham's ideas influenced subsequent philosophers, including John Stuart Mill, and have had a lasting impact on moral philosophy, political theory, and legal reform. Utilitarianism continues to be a significant framework in debates on ethics and governance.