Indeed Luckgirl the survival of the fittest Darwin.
It’s great that we raise these questions about religion, meaning of life, purpose, and so on. An unexamined life is not worth living attributed to Socrates. Those who just don’t bother surprise me.
For those who don’t accept traditional religious explanations it’s worthwhile having a look at humanism. I joined a local group a few years back, and have found a bunch of thoughtful, intellectually questioning, fun, caring, ethical people, very involved in community activities including multi faith groups.
It’s not just those of faith who try to live by the adage of treat other people as you would want them to treat you.
Many well known people are humanists including Sandi Toksvig, Adam Rutherford, Stephen Fry and many more including a Parliamentary cross-party group of around 115, and a long list of scientists, mathematicians and philosophers.