For an interesting book-length treatment of this topic, see When Soldiers Say No: Selective Conscientious Objection in the Modern Military, which examines both

For an interesting book-length treatment of this topic, see When Soldiers Say No: Selective Conscientious Objection in the Modern Military, which examines both the philosophical arguments for and against and a selection of case studies from around the world. https://www.routledge.com/When-Soldiers-Say-No-Selective-Conscientious-Objection-in-the-Modern-Military/Ellner-Robinson-Whetham/p/book/9781138246058 https://www.routledge.com/When-Soldiers-Say-No-Selective-Con...