The true statement regarding the taxonomic system is:
The current taxonomic system is based on the Linnaean classification system.
The Linnaean system, developed by Carl Linnaeus, serves as the foundation for modern taxonomy, organizing living organisms into hierarchical categories such as kingdom, phylum, class, order, family, genus, and species.
The other statements are inaccurate: not all living or extinct species have been cataloged, and Charles Darwin did not create the taxonomic system. He contributed significantly to the understanding of evolution, but the classification system predates his work.