Life is sacred? :dubious: OK, so what about the tension between two sacred things? If we use Kant’s argument for the value of human life, then plenty of creatures on Earth are sentient enough to be sacred. (Assigning sacredness on sentience is opinion; the sentience of elephants & otters is fact.)
I think that a living thing becomes more valuable the harder it is to replace or reproduce. We have a surfeit of human beings in an age where other conscious (sacredly conscious?) beings are in danger of extinction. Thus, even if a human being could be as sacred in himself as an elephant (which is problematic, considering the relative bolstering effect of a single wild elephant on the sustainablility of its environment), that human would be far more common & replaceable (unless he’s a visionary leader with his last book yet unwritten or something else massive like that, but that’s personal significance, not the standard qualities of humans in general).
So, in a society where a human being, once born, will be fed, doctored, educated, & sustained (at whatever expense to the planet’s finite supply of water & arable land), for society demands it, the opportunity to have a socially acceptable abortion (leaving aside whatever sacredness there may or may not be in reality) may, in itself, keep those resources available to other living, “sacred” things.
(Then again, population dynamics being what they are, these days those resources will be snatched up by one’s human neighbors, who are oblivious to such considerations. This leads to the waning of political power on the part of population control advocates & conservationists in general.
Therefore, in a sophisticated cost-benefit analysis, might the environmentally aware need to have large families, against their own instinct, to keep their political influence up in the years leading to the population crash? …Maybe, but the general point still holds. Which is…)
“Sacred” is a way of labeling things without analysing real value. Really, everything, every mote of dust, is sacred; some things are just more valuable than others, & relative values change; because true value is derivable from the effect on the future reality of the physical world, both constructive & destructive.