In my spiritualist theology we are on a long road to a higher state of spiritual evolution. In the present state of mankind we may not deserve to have everlasting existence, nor do I think we would want it. But if you take the longer view that we incarnate thousands of times before reaching a higher spiritual state, then we go on evolving in higher realms as immortal beings, then it all makes sense. The limited lives we are leading now are just an early stage of our evolutionary potential.
spirituality? Dante asked about the real world, the physical one.
If you reduce mankind to nothing but a physical animal then we know for a fact that we will cease to exist.
The sun is going to die, and even if we managed to find other solar systems and travel there our whole galaxy is going to collide with Andromeda. In any case the theory is that if the universe continues to expand it will end up with nothing but dead stars. So mankind is obviously on a limited life cycle that will end sooner or later.
If that is the case then there is no meaning to the Idea of deserving to survive or not, because we will not.
But if there is a spiritual reality then life may continue on into eternity in another higher form.