Humans have values, secularly as well as religious. Religion need not play a part in human values. Existentialism is moot.
It does no such thing ! You may want to read about philosophy to learn what existentialism is.
We are pretty sure it exists.
That life exists.
Atheists have friends like anyone else; existentialism is irrelevant.
Human problems belong to human beings. We have created our own problems, but resist any actions to correct human problems. If I gave a list of solutions we'd be here for 1000 years or more. Existentialism does not play a role.
Atheists believe friends exist.
Families of atheists exist.
As far as I am concerned existentialism plays no part.
By trying to bring people out of the dark ages, to be educated with scientific facts of how we got here, and not rely on some sky-fairy, but rather ourselves. The use of the word existentialism with atheiest is unnecessary.
Jean-Paul Sartre is known as the father of atheistic existentialism. He was a French philosopher, playwright, and novelist who explored themes of freedom, responsibility, and the absence of a higher power in his works.
I am not sure what is meant by Life Domain Family. It may not necessarily have to do with atheism. and nothing with existentialism.
The two main types of Existentialism are Christian Existentialism, which integrates religious beliefs with existential ideas, and Atheistic Existentialism, which rejects the concept of a higher power or divine order in favor of individual freedom and responsibility.