I believe there is, but this is not provable, it's mere belief based on sound philosophical evidence.
"If there is no God, then there is no life beyond the present one, no higher authority on moral issues".
Whether or not there is a God has no bearing on: (1) whether there is an afterlife, nor on (2) whether you can have sound morals.
Atheists view this question through the lens of materialism and a philosophy that assumes purely material causes for the origin of life.
Hence, materialists embrace the only alternative they have- evolution.
Yes, materialism limits your options, by definition. If there is no immaterial aspect to the self, then when the body dissolves, so does the conscious sense of self.
But it's possible to believe in evolution and God at the same time, so evolution is not of necessity anti-God.
But what could be more worthwhile and of greater consequence- than finding a trustworthy answer to such a fundamental question?
Actually, the question of whether or not our soul (if we have one) survives death is irrelevant. It is unknowable and it is not necessary to know this to have a fulfilled and meaningful life. Atheists don't believe it and they have fulfilled and meaningful lives, at least as much as anyone. In fact, many Fundamentalist evangelical Christians I know live a pretty turbulent emotional and spiritual life, always fretting about whether God approves, and why he did such and such, and are their works really pleasing him, and on and on.