Thomas was one of the University of Michigan Law School's first professors. He made a lasting impact on the school for decades working up his rank to becoming a dean. Before Cooley's developed the Michigan law school he served as a Michigan Supreme court chief justice for 20 years.
- Make sure to check out his American law scholars wikipedia page.
The Cooley Doctorine was one of his various famous works, the main premise was “local government is a matter of absolute right; and the state cannot take it away.”