Benjamin Williams Crowninshield, a member of a prominent Boston family, established his career in the family shipping business, Geo. Crowninshield & Sons, where he gained significant experience in maritime commerce. His early political involvement included a notable role in the first gerrymander, a redistricting effort in Essex County that strategically favored Republicans. Crowninshield's career transitioned from the private sector to public service, where he demonstrated adeptness in political strategy and legislative matters.

Benjamin Williams Crowninshield's political career is marked by a calculated approach to leveraging regional economic interests. His involvement in the family shipping business reveals a vested interest in maritime commerce, which he strategically used to influence state politics. Notably, Crowninshield was a key figure in the creation of the first gerrymander, showcasing a willingness to manipulate electoral boundaries for partisan gain. This unexpected convergence with opposing factions on redistricting highlights a highly localized strategy aimed at protecting industrial interests.