Michael Moore's 2007 indictment of US health care. The Moore film that aged best.
From Wikipedia
Sicko is a 2007 American political documentary film by filmmaker Michael Moore. Investigating health care in the United States, the film focuses on the country's health insurance and the pharmaceutical industry. Moore compares the for-profit non-universal U.S. system with the non-profit universal health care systems of Canada, the United Kingdom, France and Cuba.