"The following film deomstrates in five ways just how animals have come to serve mankind... lest we forget." Earthlings is a documentary narrated by Joaquin Phoenix, and viewer discretion is rightfully advised. This film introduces the term Earthling as one who inhabits the earth, "Humans, therefore, being not the only species on the planet, share this world with millions of other species, as we all evolve here together." Today, it is clear that the human earthlings tend to dominate this world, and it is here that the term Speciesism is acknowledged; by analogy with 'racism' and 'sexism' the word 'speciesism' is a prejudice.

The definition of the term speciesism is the, "prejudice or attitude of bias in favor of the interests of members of one's own species and against those of members of other species." This video explains some of the biggest industries in the world, and how the rely completely on the suffering of other species. Split into five different subjects: Pets, Food, Clothing, Entertainment, and Scientific Research, this film is able to personify the amazing characteristics of life on Earth, and, "like us, these animals embody the mystery and wonder of consciousness."