A Pro-Life Coalition of Pennsylvania rally outside Dr Kermit Gosnell’s closed abortion clinic in Philadelphia. Three years ago, Dr Gosnell was convicted of the first-degree murder of three infants, the involuntary manslaughter of a patient  and other felony counts. Photograph: Jessica Kourkounis/Getty Images

Working on the movie and book about Kermit Gosnell, the Philadelphia abortion doctor convicted of murder, I acquired a swift education on abortion, le(...)