Although the Binomial System of nomenclature requires that each species be assigned a unique,  two-word (Latin) name,  there must be a hierarchical system for arranging organisms  in a logical and retrievable fashion.  Such a system now recognizes at least seven taxonomic ranks (taxa) to which each organism must be assigned.  For humans, these taxa are (in descending order of inclusiveness):

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Primates

Family: Hominidae

Genus: Homo

Species:  Homo sapiens