Green taught the Law for 63 years. He was instrumental in keeping the Cumberland School of Law alive through the
American Civil War and during the
Reconstruction period, although his adherence to
legal formalism and the devastation wrought by the Civil war are, perhaps, reasons why Cumberland did not follow the institutions of that time like
Harvard or
Yale. It is also noted that while Cumberland remained impoverished after the Civil War, Green did not. (p. 98-99) ==Death and legacy==