* Species are groups of organisms that can reproduce and create fertile offspring. They are relatively specific, focusing on the ability to interbreed.

* Genus is a broader category that includes multiple related species. For example, the genus *Pan* includes chimpanzees, bonobos, and gorillas.

* Family is even broader, encompassing multiple genera. The family *Hominidae* includes all the great apes, including humans, chimpanzees, gorillas, and orangutans.

* Order is a still larger category, grouping together related families. For example, the order Primates includes monkeys, apes, and lemurs.

* Class is even more inclusive, encompassing related orders. The class Mammalia includes all mammals, like bats, whales, and humans.

* Phylum is a major grouping of organisms with common characteristics. The phylum Chordata includes all animals with a backbone, including fish, birds, reptiles, amphibians, and mammals.

* Kingdom is a very broad category that groups organisms based on fundamental similarities. For example, the kingdom Animalia includes all animals.

* Domain is the most inclusive grouping in the modern classification system. There are three domains: Bacteria, Archaea, and Eukarya.

Therefore, Domain is the most inclusive group of organisms, containing all living things.