Everything always changes. We evolve because we learn because we are always experiencing, and those experiences will always change us, even if it is a microscopic change. Those changes get passed down through our genetics and behaviors.
Biological and (possibly its subset) behavioral evolution have the role of ensuring life's endurance.
We are braver and wiser because they existed, those strong women and strong men... We are who we are because they were who they were. It's wise to know where you come from, who called your name.
Believe in life! Always human beings will progress to greater, broader, and fuller life.
Physical evolution is a material manifestation of the same reality on the spiritual level.
The role of evolution is to allow things to survive over time. Evolution is not limited to biological things. Good thoughts and ideas also need to evolve over time. If they don't, they will also die.