Since we're talking about abortion and similar issues, here's my take, in an article that I had published in Quadrant, on what I considered at the time to be the most sophisticated arguments against abortion. I followed up with an argument more about stem-cell research (and hence about early embryos) a few years later in The Journal of Medical Ethics - but this is behind a wall.
I still think that what I wrote in Quadrant was pretty good, but of course the debate keeps moving on. My only caveat about the article is that there could be new arguments Out There that I don't consider, in a piece written the best part of a decade ago now.
For those who are not aware of it, my website includes a good sample of the writing I did for Quadrant when it was under the editorship of the late Paddy McGuinness. It also contains other interesting (I hope) stuff, including some fairly comprehensive and nearly-up-to-date bibliographies of my work, so you might want to have a poke around while you're there.