Joel A. Tarr (born 1934) is an American

historian A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the st ...

, currently the Richard S. Caliguiri University

Professor Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professors ...

of History and Policy at Carnegie Mellon University. His research includes

environmental A biophysical environment is a biotic and abiotic surrounding of an organism or population, and consequently includes the factors that have an influence in their survival, development, and evolution. A biophysical environment can vary in scale f ...

and

urban development Urban means "related to a city". In that sense, the term may refer to: * Urban area, geographical area distinct from rural areas * Urban culture, the culture of towns and cities Urban may also refer to: General * Urban (name), a list of peop ...

and systems and their effects. Tarr co-authored a book with Clay McShane titled, ''Horse in the City: Living Machinces in the Nineteenth Century''.

References

1934 births Living people 21st-century American historians 21st-century American male writers Carnegie Mellon University faculty Northwestern University alumni Rutgers University alumni Leonardo da Vinci Medal recipients American male non-fiction writers {{US-sci-historian-stub