May I recommend this eye opening video

https://youtu.be/FmX8au0xGlY

Viruses are directly involved in our evolution. As in, you have virus dna in your dna. This is how we can tell species apart and stuff like that and see when they branched off (rough paraphrasing) viruses have been merging with our dna for a long time and scientists can use this information to map out the tree of life.