How did Carolus Linnaeus change the way animals are named and classified?

Carolus Linnaeus revolutionized the field of zoology and biology by establishing a uniform, systematic approach to naming and classifying organisms. Before his work, species were often identified by cumbersome, diagnostic descriptive phrases; Linnaeus replaced these with binomial nomenclature, a system where each organism is assigned a two-part Latin name consisting of its genus and species.123

His contributions fundamentally changed classification in several ways:

• Standardized Naming: By using Latin, he provided a universal language for scientists, independent of local names. His "law of priority"—the rule that the first properly published name takes precedence—became the foundation for international codes of nomenclature.23
• Hierarchical Structure: Linnaeus organized life into a nested hierarchy, including kingdom, class, order, genus, and species, a framework that remains the backbone of modern taxonomy.2
• Systematic Treatment: Through his seminal work, Systema Naturae, he provided the first widely accepted, systematic method for arranging the diversity of life.32

While his original classifications were based on idealized morphology rather than evolutionary descent, his methodology set the essential style and rigor for all subsequent biological classification.2