Research interest includes the social history of the early American republic, American statesmanship, the presidency, intellectual history from Socrates onward
- Field PS. (2018) Lincoln and the Abolitionists. In Green M (Ed.), Blackwell's Companion to Abraham Lincoln: 200-215. Oxford: Blackwells.
- Field PS. (2017) "Abe Lincoln and Political Friendship". Christchurch: Canterbury History Foundation Annual Lecture, 23 Jul 2017.
- Field PS. (2017) "Aristotle on Abraham Lincoln”. Princeton, NJ: Princeton University Madison Seminar, 18 Apr 2017.
- Field PS. (2017) "Will The USA Survive Trump?". Christchurch: U3A Okeover, 16 Nov 2017.
- Field PS. (2017) “Can Aristotle Explain Abraham Lincoln?”. Christchurch: History Dept. Seminar Series, 01 Mar 2017.