-Argued as being just by claims that this unborn human being is not a "person". Though claims such as these have been made in many other incidences of genocide and slavery in the past.
-Decriminalized so women who are raped or are victims of incest need not to suffer any more though most abortions are done as a form of birth control.
The act of terminating the life of an offspring before it is developed enough to leave the womb. Wouldn't be such a big issue if the vast majority of people who undergo it didn't make the stupid decision of fucking without thinking ahead about the consequences, such as getting pregnant as a result.