Born in
Danvers, Massachusetts, Putnam attended
Phillips Academy in
Andover, and later graduated from Harvard in 1787. He was admitted to the Essex Bar in 1794 establishing a practice in Salem. Putnam was elected in 1808 and 1809 to represent Salem in the
state senate. He eventually became a justice of the Massachusetts Supreme Judicial Court in 1814 where he wrote an opinion in
Harvard College v. Amory, which established the
Prudent man rule in US Law. Concurrently during his tenure he was also elected in 1822 as a trustee of Dummer Academy (now
The Governor's Academy). Putnam was honored in 1825 when he received a doctorate from the
University of Cambridge in England. ==Personal life==