The true statement regarding the taxonomic system is:
The current taxonomic system is based on the Linnaean classification system.
Charles Darwin contributed significantly to the understanding of evolution and natural selection, but he was not the creator of the taxonomic system; that was developed by Carl Linnaeus. Also, it is not accurate to say that all past extinct species or all current living species have been cataloged, as many species are still being discovered, and some may never be known.