Yes, the theory of evolution fundamentally changed the way biologists thought about classification. Before Darwin, classification was largely based on similarity of physical traits. This was called the "typological" approach, where species were seen as fixed and unchanging.

However, Darwin's theory of evolution by natural selection introduced the idea of descent with modification. This meant that species were related through a shared ancestry, and their similarities reflected their evolutionary history.

This led to a phylogenetic approach to classification, where relationships were based on evolutionary history rather than just similarities. This shift resulted in:

* Emphasis on evolutionary relationships: Classifications began to reflect the evolutionary relationships between organisms, grouping together species that shared a common ancestor.

* Hierarchical classification: The hierarchical system of classification (Kingdom, Phylum, Class, Order, Family, Genus, Species) became more closely linked to the evolutionary history of organisms.

* Dynamic classification: Classification became more dynamic, as new discoveries and evolutionary relationships were uncovered, necessitating changes in the way organisms were grouped.

The theory of evolution thus moved classification from a static, typological system to a dynamic, evolutionary framework, providing a much more accurate and insightful way of understanding the diversity of life on Earth.