This editorial begins, perhaps unusually, with a personal anecdote from Ives, one of the editors of this special edition, which sets the scene for the edition and, to some extent, explains why the debates presented in these pages are needed:When I was first starting out as a Ph.D. student in 2004, I submitted a paper to a philosophy journal that discussed the ethics of creating fatherless families. The paper tried to unpick the debate, sort out the moral claims from the empirical ones, and consider how implicit value claims affected the way that the empirical data were used in 'ethical' argument. As such, a good deal of the paper was devoted to critically assessing various key pieces of empirical evidence, which made claims either that children were harmed by being without a father, or that they were not. The paper was not accepted for publication (and most probably for good reason), but I was struck by one comment from a reviewer, who asked what business I had looking critically at research evidence, and why on earth did I think I had the skills to do so? What I should do as an ethicist, I was implicitly told, is cite the evidence and be done with it.