This document discusses phylogenomics and how analyzing genome sequences through an evolutionary lens can provide insights into how species evolve. It covers several topics: introducing phylogenomics and how evolutionary analysis is key to interpreting genomes; examples of phylogenomic studies of species evolution, uncultured organisms, and functional predictions; and the importance of increasing phylogenetic diversity in genome sequencing to better understand evolution. The document advocates for taking an evolutionary perspective in comparative genomic studies.