Ephraim Kirby's foundational background includes a distinguished military career, legal practice, and public service. He served in the cavalry during the American Revolution, earning multiple wounds and participating in significant battles. After practicing law in Connecticut, Kirby held various public offices, including service in the Connecticut General Assembly. He also held leadership roles in both the public and private sectors, such as Director of the Western Reserve in Ohio and Supervisor of Internal Revenue for Connecticut. Despite unsuccessful bids for higher offices, Kirby's contributions to law and governance were notable, including the compilation of the first volume of law reports in America.

Ephraim Kirby's political career is marked by an intriguing blend of traditionalism and innovation. Despite his deep-rooted lineage in Connecticut, his legislative efforts often bridged ideological divides, as seen in his work within the Connecticut General Assembly. His judicial appointments and leadership roles, including the first Superior Court Judge of the Mississippi Territory, suggest a strategic focus on regional stability and development. Kirby's unique approach to governance, however, remains largely unexplored, hinting at a nuanced and calculated political philosophy.