Murder is not morally relative. It's either a human or it's not, full stop. I don't care if all the legal systems in the world call killing an innocent human okey dokey, nor whether it's democratically decided upon or if someone's personal morality gives them carte blanche.
The Big Bang either happened or it didn't. We either evolved or we didn't. These concern truths and science is a method for discovering the truth. Whether a preborn infant is a human or not also has a yes/no- true/false answer and I find it ironic that much time energy and money is thrown into answering truths from long ago concerning the "origins of man" that have little if any bearing on today's human condition yet we don't spend an equal amount of scientific time and public funding to answer this very significant question of "is the thing in a woman's belly a human being or not?"- being as how that is also an "origins of men" issue.
What got me thinking on the irony is I thought I was opening an article related to the abortion issue when I clicked on it because of the title. It turned out to be an interesting article but it just got me thinking on this whole thing and now here we are. I'm not criticizing anyone or anything. The evolutionary roots of man is also something I'm very interested in but if I had a choice to solve that riddle or the "riddle" of "is abortion murder?" I'd have to go for the latter one and save some real here and now lives.