With regards to the “lesser of two evils”, the Catholic position is that one may never do evil so that good may come of it, if we define evil as “sinful”.
You’re defining evil incorrectly. Evil is the negation or the destruction of the good. Sin is the free choice to deliberately do evil. For instance, the destruction of a woman’s fertility is evil. It is evil because the fertility is good. Health is good. The sexual act is good and our procreative nature is good. The willful choice to thus to use contraceptives is evil because it seeks to destroy good things: fertility, health etc. It is because of concupiscence that we are attracted to what is evil.
There is rarely (ever?) a choice only between two evils, but usually between something evil and something neutral, unpleasant, or difficult.
When you are indeed choosing between what is evil and what is neutral, unpleasant and difficult, moral decisions are fairly easy. However you are very wrong in thinking that moral decisions are almost universally as black and white like that.
When I was younger, people used to talk to me about gray areas. I’d spit back at them “gray is just another shade of black.” But the fact of the matter is that these situations do exist quite frequently. Meanwhile our ability to reason and to make moral decisions is clouded by concupiscence which we all suffer with. So basically in many situations we are a bunch of near sighted people without glasses trying to find our way home in the fog.
Now Christ is the shepherd and the good news is that we are to follow Him, follow His voice. He helps us on this path, and He gave us the Church to help guide us.
I already know that the Church teaches that the ends does not justify the means and I know she teaches the principal of double effect. I am asking if the lesser of two evils is a part of Church doctrine or is the principal flawed. I’m not asking about a situation a moral decision I am currently making. I just realized that I remember learning about this principal and cannot recall if it is opposed to the Catholic faith or not.
My question of the meaning of “unity” in my previous post was an entirely other issue.
Thank you.