A sample of my ever-evolving thoughts on abortion
The science community has so far been unable to define the beginning of human life in such a way that there can be no mistake about its validity. As a result, different people have different beliefs about when life starts, and they consequently believe that anyone with a different belief is wrong. In general, "pro-lifers" believe life begins at conception and "pro-choicers" believe life begins sometime after that (some believe at "viability," some at birth, etc.).
From this basic disagreement, that despite all the arguments made for the various sides is inevitably reduced to a difference of beliefs, stems the endless screamings, arguments, rallies, legislation, and court cases that are the "abortion issue." My own belief is that all of these efforts should be focused on finding real ways of reducing abortions: positive steps toward reducing rape, increases in adoption options, increases in sexual education and birth control availability, etc. Perhaps we cannot all agree on whether an abortion is "wrong" and therefore on its legality. But I think that most would agree that the non-legality-related avenues toward abortion reduction are for the good regardless.
I'm not saying, then, that we should just keep abortion legal and work to reduce it. Nor am I saying that we should make it illegal. I'm saying that wasting any more breath, energy, time, or money on arguing either way is a pointless and harmful avenue so long as it is clearly not possible to reach a consensus on the beginning of human life.
(And yes, I realize the irony and possible hypocrisy in using time and energy to argue against arguing about abortion legality.)