American Constitution Society | 6,550 followers on LinkedIn. The leading progressive legal organization with more than 250 student and lawyer chapters across the nation. | ACS believes that the Constitution is “of the people, by the people, and for the people.” We interpret the Constitution based on its text and against the backdrop of history and lived experience. Through a diverse nationwide network of progressive lawyers, law students, judges, scholars and many others, we work to uphold the Constitution in the 21st Century by ensuring that law is a force for protecting our democracy and the public interest and for improving people’s lives.