Indeed but the murderer has not lost his right to life. If you can safely protect your family without killing him you should not kill him. Even if you are obliged to kill him it does not alter the fact that everyone is born with the right to life. To kill him is the lesser of two evils.
But you agree that in life we sometimes have to choose between the lesser of two evils?
That is not consistent with my understanding of rights—legal, moral or otherwise codified guarantees on freedom.
Why not? Don’t courts decide whether killing in self-defence is justified?
Your uncertainty seems to reveal cynicism - as if the right to life is no more than a human convention. Is that what you believe? If so why bother to respect it?
As an atheist, I see rights as human conventions, yes. As a Catholic, I suspect that the rights granted by human entities are considerably less important to you than those rights you believe God grants to us.
If both sets of rights are identical the question does not arise. If human-granted rights conflict with God-given rights we reject them.
But surely you can agree that even if divinely-granted rights matter the most, human-granted rights still have some importance.
Of course.
For example, the right to own a firearm is guaranteed by the United States government, a human institution;
I reject that right in view of the consequences to which it leads!
You have the government-granted right to visit your spouse in the hospital, should she become incapacitated; we have the right to travel freely from state to state; etc. Are these rights unimportant to you? I should think not. They’re certainly important to me. Yet they are not divinely-granted rights.
Belief in divinely-granted rights does not exclude the need for human-granted rights.
Perhaps you think that the importance of human-granted rights comes ultimately from the importance of divinely-granted rights. So, for instance, we could say that governments get their authority from God, and so we should respect, possibly with exceptions, the rights granted by those governments for that reason.
I don’t believe that at all because the decisions of governments do not always reflect the wishes and welfare of the people. Even when they do rights do not exist because they been granted by governments but because rights exist regardless of whether they are recognised by anyone! Even if everyone voted against the right to life it would not make it disappear!
However, I do not require any higher authority.
I believe you do! The fallibility of governments is not a sound reason to accept their authority. Nor is your own fallible judgment not that of any other human being - as we can see from the history of the human race.
I respect our government because I appreciate its benefits, not just those granted to me but to all citizens. And I respect the general ethical opinions of my culture for a variety of reasons, not the least of which is that I wish to interact with others as a social being.
I agree with you. The general ethical opinions of our culture are far superior to others for definite reasons - one of which you have given. They are not based on emotion but on rational considerations. They are not based on subjective opinions but objective facts. The highest authority in this world is reason - although it cannot be the ultimate authority. We cannot co-exist in peace and harmony unless we respect the rights of others. Rights are based on our social nature and our personal needs. They are based on the fact that we all have a capacity for choice, enjoyment, friendship, love and happiness. Why should people be deprived of their opportunities unless they interfere with those of others?
It is obviously possible to believe all this without believing we are created by God but it is difficult to understand how we have acquired these capacities if we exist for no ultimate reason or purpose. Survival value is a grossly inadequate explanation of our existence as persons rather than animals.
It follows that neither atheism nor theism is intrinsically more moral. Atheists can and often do share all the moral values of Christianity
with regard to life in this world. Whether they have a rational basis for doing so is another matter! But our main concern should be how people live rather than their metaphysical beliefs. We cannot love God unless we love our neighbour - and Jesus defined our neighbour as anyone who needs our help, regardless of race or creed…