What can be proven about an afterlife.
Man could not prove anything concerning an afterlife.
Nature governed by chance, I believe differently nature is governed by the Creator / example Man created a television to function in a specific way and that television does. God created the Earth to function in a certain way and the Earth does.
The Bible tells us that there will come a falling away before that man of sin is revealed, meaning many who say they are believers will cease to believe - therefore atheism grows - but that is for believers to acknowledge.
Have a happy New Year