Those of us who are not Abrahamic fundamentalists, however, find it much easier to identify the objective realities of parenthood. Children cost over $200,000 each to raise from birth through age eighteen. They frequently result in the worst forms of psychological depression, especially for women. Since astounding advances have been made in elder care, reproduction is no longer a necessary human insurance policy. Most importantly though, technological developments in the fields of contraception and sterilization have allowed people to foster committed lifelong relationships without fear of an unplanned pregnancy. In short, we have weighed the benefits and drawbacks of parenthood against one another and found that parenthood itself, at least in our post-agrarian society, is really a raw deal.
It is amazing how political the issue of whether or not one wishes to be a parent truly is. All things considered, it comes down to the same reason that somebody pulls the lever for a certain candidate on election day; self interest. For the devout clergy of salvation religions, favor is curried with the Creator. For participants in existential ones, increased freedom means increased happiness. For every single last one of us, our own needs are met in one way or another. Some opt to define these needs through theological interpretations, while others realize them in an empirical fashion.
Either way, I believe that we all can agree on the following; it is best to respect our neighbors' choices, specifically when they pertain to a matter as personal as this. More likely than not, their preferences are not ours, but it is the diversity of ideas, ideals, and philosophies that make any free society exactly that.