He has published research on justice and future generations, parental rights, paternity, instrumental rationality and benefit-cost analysis, among other topics.
As a researcher in moral philosophy, Hubin has written on the scope and nature of justice when there are conflicts between two entities.
He contrasts the fundamental differences when two person have legitimate claims to the same goods or service versus the conflict between white blood cells and an invading virus, providing other in between examples such as conflicts within a family or problems between non-overlapping generations.
[4][5] In 2015, Hubin participated in a Veritas Forum debate on miracles with MIT nuclear physicist Ian Hutchinson, where Hubin took the atheist perspective versus the religious beliefs of Hutchinson.
He has also written on parental rights and due process; on untangling the puzzles of paternity; on elements of stereotypical fatherhood; on procreation and sexual asymmetries, and on reproductive interests.