This is from a few years back but it’s well worth your time. From J. Budziszewski:
Things are getting worse very quickly now. The list of what we are required to approve is growing ever longer. Consider just the domain of sexual practice. First we were to approve sex before marriage, then without marriage, now against marriage. First with one, then with a series, now with a crowd. First with the other sex, then with the same. First between adults, then between children, then between adults and children. The last item has not been added yet, but will be soon: you can tell from the change in language, just as you can tell the approach of winter from the change in the color of leaves. As any sin passes through its stages from temptation, to toleration, to approval, its name is first euphemized, then avoided, then forgotten. A colleague tells me that some of his fellow legal scholars call child molestation “intergenerational intimacy”: that’s euphemism. A good-hearted editor tried to talk me out of using the term “sodomy”: that’s avoidance. My students don’t know the word “fornication” at all: that’s forgetfulness.
The pattern is repeated in the house of death. First we were to approve of killing unborn babies, then babies in process of birth; next came newborns with physical defects, now newborns in perfect health.
[…]
First we were to approve of suicide, then to approve of assisting it. Now we are to approve of a requirement to assist it, for, as Ernest van den Haag has argued, it is “unwarranted” for doctors not to kill patients who seek death.
[…]
So why do things get worse so fast? It would be well to know, in case the process can be arrested.
[…]
The usual explanation is that conscience is weakened by neglect. Once a wrong is done, the next wrong comes more easily. On this view conscience is mainly a restraint, a resistance, a passive barrier. It doesn’t so much drive us on as hold us back, and when persistently attacked, the restraining wall gets thinner and thinner and finally disappears. Often this explanation is combined with another: that conscience comes from culture, that it is built up in us from outside. In this view the heart is malleable. We don’t clearly know what is right and wrong, and when our teachers change the lessons, our consciences change their contents. What once we deemed wrong, we deem right; what once we deemed right, we deem wrong.
